falsifying Natural Selection

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Re: falsifying Natural Selection

Post by GenesForLife » Sun Oct 31, 2010 4:43 pm

spinoza99 wrote:It is very hard to have a real dialogue with you. It is obvious from the profanity that you harbor such a burning hatred for my ideas that even if you did find a flaw in you're own reasoning you would never admit to it. It would be irrational for me to expect to learn anything from someone who would never admit to a truth that ran counter to his beliefs.
1.The papers I present are NOT my own reasoning, fucking deal with it.
2. It would be rational for you to learn from the literature and ensuring you can actually understand elementary biology before you go spouting crap off.
3. The scientific consensus is NOT a belief, projection much?
4. If it is so hard for you to have a dialogue with me I suggest you learn to read by yourself, or go to Uni and get an education first.
5. I will change my stance as and when papers pass through scientific peer review in proper journals, if you have such evidence, present it, publish or perish, put up or shut the fuck up.
6. I am not expecting you to learn anything from me, the free explanations of a body of well established scientific literature are for the passers by who may be swayed by such guff as has been forthcoming from you thanks to ignorance, I do not expect you to learn anything at all since it is clear that you do not have the scientific knowledge required to even begin to appreciate the papers I'm presenting here, it isn't all about you, deal with it.
7. Belief is such a fuckwitted word, the scientific community doesn't operate on faith you know, if evidence does pop up in peer reviewed literature I'm willing to change my stance, insisting upon high standards of evidence =/= being close minded, your handwaving of reality because it gives your mythology a middle finger IS, and any attempts to suggest otherwise is nothing more than a blatant case of projection.
8. "You are biased, and rude, and hard to speak to, therefore intelligence causes mutations and therefore randomness cannot be involved" What kind of non-sequitur is that?
They chose 139 random polypeptides,
Who is they? We're talking about 20 different amino acids and they all have to line up in a precise order. How does one amino acid know to get in the right order?
They being the scientists, there are bioinformatics tools that generate random peptide sequences, such as RandSeq which generates a random protein sequence, which can be found on Expasy's server.

1) Generate sequence.
2) Convert sequence to DNA (amino acids are mapped to specific nucleotide triplets)
3) Synthesize DNA
4) Insert DNA into phage genomes by genetic engineering using a plasmid.

In this case they introduced an external random sequence to ensure they'd start off with a random sequence and that there was no co-optation involved.

How do the amino acids know how to line up?

Translation. (Again elementary biology)
The chemistry of which is represented thus

Image

And the process of which occurs thus

Image





they synthesized the DNA corresponding to that, they introduced that into bacteriophages, rendering them defective.
Substitutions by random mutation during phage replication began to act on that sequence, changes in sequence resulted in improving fitness (an increase in infectivity)
Proteins are not fit, they either work or they don't, it's binary, 1 or 0. You can't have a protein with less than a 100 or amino acids.
Fucking nonsense, there are proteins whose functions (as in efficiency of functioning) vary, for the better and for the worse. A random sequence of 300 nucleotides will produce a random protein of 100 amino acids.
proteins have shapes, conferring function, different shapes have different functions and this functionality can vary, and what citation do you bring to support your assertion? Precisely none. I will also present another paper to show you how asinine your assertion is.

The evidence is here and by the look of things the full paper is downloadable.
The large subunit (HycE, 569 amino acids) of Escherichia coli hydrogenase 3 produces hydrogen from formate via its Ni–Fe-binding site. In this paper, we engineered HycE for enhanced hydrogen production by an error-prone polymerase chain reaction (epPCR) using a host that lacked hydrogenase activity via the hyaB hybC hycE mutations. Seven enhanced HycE variants were obtained with a novel chemochromic membrane screen that directly detected hydrogen from individual colonies. The best epPCR variant contained eight mutations (S2T, Y50F, I171T, A291V, T366S, V433L, M444I, and L523Q) and had 17-fold higher hydrogen-producing activity than wild-type HycE. In addition, this variant had eightfold higher hydrogen yield from formate compared to wild-type HycE. Deoxyribonucleic acid shuffling using the three most-active HycE variants created a variant that has 23-fold higher hydrogen production and ninefold higher yield on formate due to a 74-amino acid carboxy-terminal truncation. Saturation mutagenesis at T366 of HycE also led to increased hydrogen production via a truncation at this position; hence, 204 amino acids at the carboxy terminus may be deleted to increase hydrogen production by 30-fold. This is the first random protein engineering of a hydrogenase.
http://www.springerlink.com/content/32vn61n3h463k270/

Sequence variations introduce different levels of functioning, and when placed under selection, for example in microbes which use H2S for metabolism, as an electron acceptor, those that produce more hydrogen will have more fitness than those that produce less, protein function IS not digital, wherefrom you got such a mistaken understanding I do not know, unless you are deliberately spewing forth falsehoods to provoke, in which case you are nothing more than a despicable troll.

Of course, see the second graph on the PLoS paper, where the functional efficiency, in this case infectivity, increased with substitution and selection also lays waste to your assertions, there are not just two states of function, but various states that climb steadily, in other words, it is NOT binary. Evidence says you are wrong, so deal with it, and if you don't it is you and not me who will ignore anything that goes against your view regardless of the standard of evidence, which unsurprisingly like most people who project their character onto others, you are.

It will also show you that to have a functioning phage protein there is more than one possible sequence, firstly , and secondly, mutation + selection shape random sequences into functional ones , your argument of "139 precise order 139 precise order" is nothing more than a fuckwitted exposition of dimwitted ignorance of elementary molecular biology.
With a sequence 120 long made up 20 different amino acids, the sum total of possible sequences is 10^150 roughly. There are about 600 different proteins. Just to get the odds down to 10^80 of one protein forming you would need 10^70 different possible protein sequences. There of course may be more 600 different proteins, but anything more than 2000 is highly unlikely, 10,000 impossible.
This is so wrong I ddon't know where to start.

1.Strawman...proteins just don't pop into existence out of nowhere, read about translation.
2.There are 20,000 proteins in humans.
3.As for asking where they can come from, try gene duplication and whole genome duplication. Proteins are produced by the translation of genomes, genomes are produced and acted upon by mutagenic processes. Mutagenic processes can generate proteins with diverse functions from genomic material. Natural processes explain the evolution of proteins, now that is it.

I am half intending to report you for trolling.

PS- "You cannot have a protein that is less than" assertion has this in reply.

There is an example of a very short polypetide that assume 3d comformation, which is the pre-requisite for protein function.
We have designed a peptide termed chignolin, consisting of only 10 amino acid residues (GYDPETGTWG), on the basis of statistics derived from more than 10,000 protein segments. The peptide folds into a unique structure in water and shows a cooperative thermal transition, both of which may be hallmarks of a protein. Also, the experimentally determined β-hairpin structure was very close to what we had targeted. The performance of the short peptide not only implies that the methodology employed here can contribute toward development of novel techniques for protein design, but it also yields insights into the raison d'etre of an autonomous element involved in a natural protein. This is of interest for the pursuit of folding mechanisms and evolutionary processes of proteins.
http://www.cell.com/structure/retrieve/ ... 2604002424

Oxytocin, which also has functions, is a peptide hormone consisting of just nine peptides. (proteins are defined as just polypeptides with a weight of more than 10,000 Daltons)
Last edited by GenesForLife on Sun Oct 31, 2010 4:56 pm, edited 2 times in total.

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Re: falsifying Natural Selection

Post by Ronja » Sun Oct 31, 2010 4:52 pm

spinoza99 wrote:It is very hard to have a real dialogue with you.
Having read this thread, I would say it is harder to have a real dialogue with *you*. Details coming up next.
spinoza99 wrote:It is obvious from the profanity that you harbor such a burning hatred for my ideas that even if you did find a flaw in you're own reasoning you would never admit to it.
That is a strange logic you propose: maybe you only have experience of people who hate and use profanity. In my experience, since August 2007, of rational thinking / atheist forums, the use of profanity much more often stems from frustration than from anything even approaching to hate. Not all anger is hateful - not even close.
spinoza99 wrote: It would be irrational for me to expect to learn anything from someone who would never admit to a truth that ran counter to his beliefs.
Funny - I was going to say that about *you*. I have already advised GFL that you may well have a bad case of Morton's demon (http://www.talkorigins.org/origins/postmonth/feb02.html ), and thus trying to discuss with you may be utterly pointless.

Spinoza99 - I used to be a Christian once. Now I would very much like you to tell me, why did God create GFL's intelligence and capacity for critical thinking (or mine, of Feck's, or anyone else's here), if He did not intend us to use them?

BTW: every single link that GFL has posted has lead to an abstract at least. An abstract summarizes the central findings of a scientific or scholarly work. Why do you write as if that is not enough for you?
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Re: falsifying Natural Selection

Post by spinoza99 » Sun Oct 31, 2010 5:36 pm

[ q u o t e = " G e n e s F o r L i f e

H o w d o t h e a m i n o a c i d s k n o w h o w t o l i n e u p ?

T r a n s l a t i o n . ( A g a i n e l e m e n t a r y b i o l o g y )
T h e c h e m i s t r y o f w h i c h i s r e p r e s e n t e d t h u s

[/quote]

This is not an adequate answer.

Phe, Glu, Ala, Phe, Val

All those amino acids have to know what the other amino acids are doing. Glu has to identify another Glu and another Phe, for example, and then get in line. How do they know that? You can't just throw amino acids in any order and get the function needed for cell replication.





[ q u o t e ] P r o t e i n s a r e n o t f i t , t h e y e i t h e r w o r k o r t h e y d o n ' t , i t ' s b i n a r y , 1 o r 0 . Y o u c a n ' t h a v e a p r o t e i n w i t h l e s s t h a n a 1 0 0 o r a m i n o a c i d s . [ / q u o t e ]

F u c k i n g n o n s e n s e , t h e r e a r e p r o t e i n s w h o s e f u n c t i o n s ( a s i n e f f i c i e n c y o f f u n c t i o n i n g ) v a r y , f o r t h e b e t t e r a n d f o r t h e w o r s e . A r a n d o m s e q u e n c e o f 3 0 0 n u c l e o t i d e s w i l l p r o d u c e a r a n d o m p r o t e i n o f 1 0 0 a m i n o a c i d s .
p r o t e i n s h a v e s h a p e s , c o n f e r r i n g f u n c t i o n , d i f f e r e n t s h a p e s h a v e d i f f e r e n t f u n c t i o n s a n d t h i s f u n c t i o n a l i t y c a n v a r y , a n d w h a t c i t a t i o n d o y o u b r i n g t o s u p p o r t y o u r a s s e r t i o n ? P r e c i s e l y n o n e . I w i l l a l s o p r e s e n t a n o t h e r p a p e r t o s h o w y o u h o w a s i n i n e y o u r a s s e r t i o n i s .

You can't just throw amino acids into any order and expect a protein with the function you want to arise. It's the same with a computer program. You can't just write any code and get the computer to do what you want. Functionality can vary, but if you want a specific function done, there is limit to how many errors you can make in the code.
Seven enhanced HycE variants were obtained
with a novel chemochromic membrane screen that directly
detected hydrogen from individual colonies. The best
epPCR variant contained eight mutations (S2T, Y50F,
I171T, A291V, T366S, V433L, M444I, and L523Q) and
had 17-fold higher hydrogen-producing activity than wild-
type HycE. In addition, this variant had eightfold higher
hydrogen yield from formate compared to wild-type HycE.
Deoxyribonucleic acid shuffling using the three most-active
HycE variants created a variant that has 23-fold higher
hydrogen production and ninefold higher yield on formate
due to a 74-amino acid carboxy-terminal truncation.Introduction
Fermentative hydrogen production has much potential as a
renewable energy source (Das and Veziroglu 2001), and
Escherichia coli is amenable to genetic manipulation
(Blattner et al. 1997). E. coli produces hydrogen from
formate by the formate hydrogen lyase (FHL) complex that
consists of formate dehydrogenase-H (encoded by fdhF
[Axley et al. 1990]) for forming 2H+, 2e_, and CO2 from
formate and hydrogenase 3 (encoded by hycABCDEFGHI

What they're saying is that they manipulated the protein to get new functions, they're not saying that you can throw amino acids into any order and get the function you want.

S e q u e n c e v a r i a t i o n s i n t r o d u c e d i f f e r e n t l e v e l s o f f u n c t i o n i n g ,
Yes, but there is a point where something either works or it doesn't. And as I have already stated there are 10^150 different sequences to form 20 acid amino in a sequence of 120. Just to get those odds down to 10^80, 10^70 different sequences would be needed.
t h e r e a r e n o t j u s t t w o s t a t e s o f f u n c t i o n , b u t v a r i o u s s t a t e s t h a t c l i m b s t e a d i l y , i n o t h e r w o r d s , i t i s N O T b i n a r y .
There is a point at which something works or it doesn't. As I have already stated you would need 10^70 different sequences just to get to the point where you have a one in 10^80 chance and those are simply over-simplified odds, the real odds are much higer, of the protein carrying out the function needed.

3 . A s f o r a s k i n g w h e r e t h e y c a n c o m e f r o m , t r y g e n e d u p l i c a t i o n a n d w h o l e g e n o m e d u p l i c a t i o n . P r o t e i n s a r e p r o d u c e d b y t h e [ i ] t r a n s l a t i o n [ / i ] o f g e n o m e s , g e n o m e s a r e p r o d u c e d a n d a c t e d u p o n b y m u t a g e n i c p r o c e s s e s .
As I have already stated translation requires the amino acids to know in what order to line up.

Y o u c a n n o t h a v e a p r o t e i n t h a t i s l e s s t h a n " a s s e r t i o n h a s t h i s i n r e p l y .

T h e r e i s a n e x a m p l e o f a v e r y s h o r t p o l y p e t i d e t h a t a s s u m e 3 d c o m f o r m a t i o n , w h i c h i s t h e p r e - r e q u i s i t e f o r p r o t e i n f u n c t i o n .
W e h a v e d e s i g n e d a p e p t i d e t e r m e d c h i g n o l i n , c o n s i s t i n g o f o n l y 1 0 a m i n o a c i d r e s i d u e s ( G Y D P E T G T W G ) , o n t h e b a s i s o f s t a t i s t i c s d e r i v e d f r o m m o r e t h a n 1 0 , 0 0 0 p r o t e i n s e g m e n t s .
Just to get 20 amino acids into a sequence of 10 those odds are one in 10^20 and that's only if we assume that the odds of forming an amino acid are one in one which they're not, and even if there are a million other possible sequences the odds are still one in 10^14.


You still have not shown why chignolin would evolve into a full-fledge protein of about 120 amino acids, especially when it has no mechanism for self-replication itself, mutating, and passing on its gens, since proteins have no genes.
Those who are most effective at reproducing will reproduce. Therefore new species can arise by chance. Charles Darwin.

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Re: falsifying Natural Selection

Post by GenesForLife » Sun Oct 31, 2010 6:09 pm

Back that up with a citation, amino acids don't have to "know" what the others are doing, if there is a gene sequence of a particular order with a start and a stop codon it will produce a polypeptide of the same length corresponding to it. And proteins ARE produced by the translation of genes, which are mutate, and self replicate.

Read this elementary bit of biological information first.
Most genes contain the information needed to make functional molecules called proteins. (A few genes produce other molecules that help the cell assemble proteins.) The journey from gene to protein is complex and tightly controlled within each cell. It consists of two major steps: transcription and translation. Together, transcription and translation are known as gene expression.

During the process of transcription, the information stored in a gene’s DNA is transferred to a similar molecule called RNA (ribonucleic acid) in the cell nucleus. Both RNA and DNA are made up of a chain of nucleotide bases, but they have slightly different chemical properties. The type of RNA that contains the information for making a protein is called messenger RNA (mRNA) because it carries the information, or message, from the DNA out of the nucleus into the cytoplasm.

Translation, the second step in getting from a gene to a protein, takes place in the cytoplasm. The mRNA interacts with a specialized complex called a ribosome, which “reads” the sequence of mRNA bases. Each sequence of three bases, called a codon, usually codes for one particular amino acid. (Amino acids are the building blocks of proteins.) A type of RNA called transfer RNA (tRNA) assembles the protein, one amino acid at a time. Protein assembly continues until the ribosome encounters a “stop” codon (a sequence of three bases that does not code for an amino acid).
What qualifications do you have in biology, I say? Because your assertions get more and more retarded all the time & anyone who asserted thus during my degree, for instance, would get laughed at and have had their arses handed to them on a plate.

The amino acids don't have to identify anything else during translation, the translation machinery does this.

Start Codon ---->first three bases ----->second three bases -----> third three bases -------> fourth three bases -------> until the stop codon.


1) Aminoacyl tRNA binds to the corresponding amino acids through the enzyme action of aminoacyl tRNA synthetases.
2) tRNA is complementary to bases on mRNA , (A binds to T , C binds to U, for instance) so AAA on the tRNA will always be bound by TTT on the anticodon arm of tRNA.
3) Methionine binds to the start codon in this way.
4) the tRNA corresponding to the next three bases and carrying its amino acid, which is again specific due to the action of its specific tRNA synthetase bound specifically, then sits in the ribosome beside Methionine, again governed by the bases that are complementary to mRNA, the ribosome catalyzes a peptide bond.
5) The ribosome shifts by three bases so that a space is created for the next tRNA to "sit" alongside, carrying its own amino acid, a peptide bond is formed again, the position of the amino acids is determined by the mRNA, which is determined by DNA, and therefore proteins are produced based on what genes tell the translational machinery, proteins mutate when the genes that produce them mutate.

These might help you learn what is such an elementary concept which you have contrived to replace with a caricature the average Indian 16 year old student will laugh at.

[youtube]http://www.youtube.com/watch?v=5bLEDd-P ... re=related[/youtube]

The what binds to what is determined by the mRNA which is determined by DNA, that is basically it.

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Re: falsifying Natural Selection

Post by GenesForLife » Sun Oct 31, 2010 6:18 pm

And before you embarass yourself further with respect to transcription and how DNA determines the mRNA sequence and through it the protein sequence, you may also want to watch this.

[youtube]http://www.youtube.com/watch?v=WsofH466lqk&NR=1[/youtube]

Or if you want a dumbed down version.

[youtube]http://www.youtube.com/watch?v=_HNAOrn6 ... re=related[/youtube]

Do not use YOUR ignorance and expect to have everything spoonfed to you.

If you want you can also read this.

http://faculty.clintoncc.suny.edu/facul ... rotein.htm

Unlike you I actually have evidence of learning these concepts and knowing about them, it is not for no reason I have a triple major with a distinction, therefore you shouldn't expect me to do your reading to deal with your ignorance for you.

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Re: falsifying Natural Selection

Post by spinoza99 » Sun Oct 31, 2010 6:28 pm

A few notes about the video. All those parts have to move to a precise location in 3 dimensional space. How do they know where to move? How is this material coordinated. And you can't say that material is coordinated because other material is coordinated.

GenesForLife wrote:Back that up with a citation, amino acids don't have to "know" what the others are doing,
They do have to know because as I have already said numerous times if you rely on the amino acids randomly lining up in the right sequence the odds are too insurmountable. Only knowledge can move a body to a precise location, randomness will move to any location indiscriminately.

if there is a gene sequence of a particular order with a start and a stop codon it will produce a polypeptide of the same length corresponding to it. And proteins ARE produced by the translation of genes, which are mutate, and self replicate.
We're talking about the time period before the existence of cells. You have to build a cell before you can get genes. In order to build the first cell that ever existed you need proteins, as well as all the other 40 or 50 parts of a cell. You can't build those parts with natural selection.
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Re: falsifying Natural Selection

Post by GenesForLife » Sun Oct 31, 2010 6:29 pm

If you want a textbook on Molecular Biology I am of course open to allowing you to read it, but somehow it appears to me you are more interested in strawman caricatures of empirically established science and not the valid versions thereof. The link is here

http://www.4shared.com/file/SbZMJK3c/Al ... fTheC.html

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Re: falsifying Natural Selection

Post by spinoza99 » Sun Oct 31, 2010 6:45 pm

Thanks for the free microbiology book, I've just downloaded it and look forward to reading it. If you know of a free organic chem or biochem textbook, let me know.
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Re: falsifying Natural Selection

Post by Svartalf » Sun Oct 31, 2010 6:52 pm

Ouch, GFL, are you going to challenge Calilasseia for most erudite scientific on the boards?
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Re: falsifying Natural Selection

Post by Ronja » Sun Oct 31, 2010 6:57 pm

spinoza99 wrote:Only knowledge can move a body to a precise location, randomness will move to any location indiscriminately.
This statement is so chock full of fail that it is hard to decide where to start.

1) Words that imply something absolute or universal, such as "only", "all", "never", "impossible" etc., are dangerous to use in a debate. - especially if you don't (can't) present iron-clad evidence for them. Claiming that anything is universal or absolute, without very definitive evidence makes you look - pardon the expression - exceedingly stupid.

2) Regarding this particular "absolutist/universalist" statement of yours (quoted above): Have you ever heard e.g. of such things as basic chemistry, for example ionic and covalent bonds, and what kind of phenomena they are based on? Or have you heard of magnetism - even fairly heavy magnets can cause each other to move from a distance, due to the simple power between them. Not to mention attraction between negative and positive electric charges. There is no knowledge involved in any of these cases - so why should there be knowledge involved in more complex biochemical reactions or bonds? Where exactly would "knowledge" enter the picture, when we move from simple, basic chemical reactions and bonds towards more complex, biochemical ones, and what evidence can you present for that?

:nono:
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Re: falsifying Natural Selection

Post by spinoza99 » Sun Oct 31, 2010 7:01 pm

Maybe I should have been more clear. Knowledge is knowing where to move bodies without reliance on physical laws. In magnetism and ionic bonding the bodies move due to physical laws, there is no knowledge.

Either a body's movement is the result of intelligence
Or a body's movement is the result of randomness
Or a body's movement is the result of blind obedience to an unbreakable physical law.

Ronja, do you believe intelligence and power exist? Intelligence is defined as knowing where to move a body, power is being able to move it in spite of physical laws.
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Re: falsifying Natural Selection

Post by Ronja » Sun Oct 31, 2010 7:02 pm

Svartalf wrote:Ouch, GFL, are you going to challenge Calilasseia for most erudite scientific on the boards?
Svartalf, have you really missed all the references to Cali's "young padawan." :o

:hehe:
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Re: falsifying Natural Selection

Post by GenesForLife » Sun Oct 31, 2010 7:04 pm

spinoza99 wrote:A few notes about the video. All those parts have to move to a precise location in 3 dimensional space. How do they know where to move? How is this material coordinated. And you can't say that material is coordinated because other material is coordinated.
Are you seriously portraying a caricature where there is just one mRNA molecule, just one ribosome and just some amino acids and just some tRNA that can only meet and carry out reactions in one place?

The green bit is the endoplasmic reticulum and ribosomes are bound to it, and it extends all over the place.

Image
Image from http://micro.magnet.fsu.edu/cells/endop ... culum.html

This is a distribution of mRNA in the cell, in this case a skin fibroblast.
Image

Image from http://nar.oxfordjournals.org/content/3 ... -expansion.

Distribution of tRNA in rat hepatocytes.

http://www.pnas.org/content/104/21/8845/F1.large.jpg

Distribution of tRNA in HeLa cells.

Image

Are you seriously telling me that stuff that is present more or less all around the cell is a "precise three dimensional location"? If so me being on the planet at the moment constitutes my precise three dimensional location, the problem with ignorance is that making shit up is easy, debunking shit is much harder not least because debunkers cannot engage in dishonesty or stupidity.
GenesForLife wrote:Back that up with a citation, amino acids don't have to "know" what the others are doing,
They do have to know because as I have already said numerous times if you rely on the amino acids randomly lining up in the right sequence the odds are too insurmountable. Only knowledge can move a body to a precise location, randomness will move to any location indiscriminately.
The amino acids don't have to know, the DNA and mRNA do that jobs for them, what part of this do you not understand? Despite already being told several times.

if there is a gene sequence of a particular order with a start and a stop codon it will produce a polypeptide of the same length corresponding to it. And proteins ARE produced by the translation of genes, which are mutate, and self replicate.
We're talking about the time period before the existence of cells. You have to build a cell before you can get genes. In order to build the first cell that ever existed you need proteins, as well as all the other 40 or 50 parts of a cell. You can't build those parts with natural selection.
Ah, the fuckwitted as usual equivalence between modern cells and ancient cells, go read the last thread you got pulverised in, where among other things I showed that self replicating entities can form without proteins, and one of the case studies included Ribozymes that can make peptide bonds, thus producing proteins without ribosomes and other things

Modern cells need proteins =/= ancient cells needed them too. So there... even the basic ability to synthesize proteins randomly doesn't require other proteins, or genes for that matter, since replicators don't need protein support for self replication. Those mechanisms are not as effective as the modern systems we have, but all that was required for such systems to be naturally selected for would be their inefficient replication, which is better than no replication at all.

Did anyone notice how Spinoza started with proteins and modern cells and assumed that protocells should also have them? This, my friends, is the classic bait and switch, aka shifting the goalposts, that is one of the most discoursively malfeasant things people can be capable of. Nobody is saying that abiogenesis is completely resolved et cetera, and it is an area of research that is very much progressing, but no evidence at the moment for the requirements of basic life processes suggests that natural processes are inadequate, in fact , a lot of the functions involved, including replication and peptide synthesis, even without ribozymes, has already been described.

protein synthesis is in fact reducible to this
Peptide bond formation by the ribosome requires 23S rRNA and its interaction with the 3′-CCA end of tRNA. To investigate the possible evolutionary development of the peptidyl transfer reaction, we tried to obtain peptide bond formation without the ribosome or rRNA simply by using a piece of tRNA—an aminoacyl-minihelix—mixed with sequence-specific oligonucleotides that contained puromycin. Peptide bond formation was detected by gel electrophoresis, TLC analysis, and mass spectrometry. Peptide synthesis depended on sequence complementarity between the 3′-CCA sequence of the minihelix and the puromycin-bearing oligonucleotide. However, proximity of the reacting species was not by itself sufficient for peptide bond formation. In addition, imidazole as a catalyst was required. Its role may be similar to the recently proposed mechanism, wherein A2451 of 23S rRNA works as a general base. Thus, peptide bond formation can be achieved with a simple, minimized system that captures the essence of an interaction seen in the ribosome.
http://www.pnas.org/content/98/4/1393.short

And we have seen the formation of very long strands of RNA , upto 150 bp long, if I recall correctly, the system they used to demonstrate pepitde synthesis was just 40 bases long.

The idea that one would need proteins to have genes and genes to have proteins is errant nonsense, it need not be the case, and evidence indicates this too.

So, can you tell me how a strawman based on something without the consideration of extant evidence and false and baseless presumptions means that an intelligent agency is mutating stuff every time a mutation happens? That is the biggest non-sequitur I've seen.
Last edited by GenesForLife on Sun Oct 31, 2010 7:24 pm, edited 2 times in total.

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Re: falsifying Natural Selection

Post by Svartalf » Sun Oct 31, 2010 7:06 pm

Ronja wrote:
Svartalf wrote:Ouch, GFL, are you going to challenge Calilasseia for most erudite scientific on the boards?
Svartalf, have you really missed all the references to Cali's "young padawan." :o

:hehe:
I probably did, between my attention deficit and the fact that most serious scientific conversation puts me out of my depth, I may have missed those lines.
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Re: falsifying Natural Selection

Post by GenesForLife » Sun Oct 31, 2010 7:08 pm

spinoza99 wrote:Maybe I should have been more clear. Knowledge is knowing where to move bodies without reliance on physical laws. In magnetism and ionic bonding the bodies move due to physical laws, there is no knowledge.

Either a body's movement is the result of intelligence
Or a body's movement is the result of randomness
Or a body's movement is the result of blind obedience to an unbreakable physical law.

Ronja, do you believe intelligence and power exist? Intelligence is defined as knowing where to move a body, power is being able to move it in spite of physical laws.
Gravity isn't intelligent, bodies can move due to gravity, gravity isn't random either.
Which illustrates that you're setting up a false dichotomy, when there is a third option available, aka testable natural processes.

Edit - I see you included physical laws in your post, I retract the accusation of setting up a false dichotomy, sorry.

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