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Originally posted by rhinoceros
Pre-biotic amino acids are: Ala, Asp, Glu, Gly, Ile, Leu, Pro, Ser, Thr and Val. How is this set limited?
The protein part of ribosomes is a "new" thing. Primordial ribosomes were in all likelihood pure rRNA. Even today, all the core functions of ribosomes are carried out by the 2-3 rRNAs.
No. You see, all life on Earth descends from a lineage in which this particular code was "set in stone". None-the-less, unlike you claim, numerous alterations have been uncovered.
Originally posted by squiz
Originally posted by rhinoceros
Pre-biotic amino acids are: Ala, Asp, Glu, Gly, Ile, Leu, Pro, Ser, Thr and Val. How is this set limited?
It's not twenty.
Originally posted by squiz
Originally posted by rhinoceros
The protein part of ribosomes is a "new" thing. Primordial ribosomes were in all likelihood pure rRNA. Even today, all the core functions of ribosomes are carried out by the 2-3 rRNAs.
Not according to this.
news.illinois.edu...
Originally posted by squiz
Did I mention this is irrelevent to my design inference? And is off topic? I shown the value of degenerative code, which makes good design sense and a very good design argument, that is what you asked for.
Originally posted by windlass34
Entropy (state of "disorder") of a closed system always increases, never decreases.[...]
Can anybody explain this to me, please?
Originally posted by rhinoceros
It's not a good design argument because you can not explain why the degeneracy is so 'strong' with abiotic amino acids and 'weak' with biotic amino acids. It's an excellent evolution argument. Further still, it points that early on only the first two nucleotides of a codon mattered as is the case with most mitochondria today (mitochondrial genetic systems have sort of made a full circle from simple to complex and then back to simple).
Originally posted by Barcs
I recommend you read about all 3 laws of thermodynamics. They don't mean nearly what you think they do. How can you say that the law proves ID while providing zero evidence whatsoever? I don't need to prove you wrong, when you can't even prove yourself right. Stop pigeon holing science into your narrow view of reality and only believing the parts of it that are convenient for your world view. The big picture is much different.edit on 21-1-2013 by Barcs because: (no reason given)
Originally posted by EnochWasRight
...Something causes life to animate. Science has no answers...
Originally posted by windlass34
Don't worry, my friend. I am fully versed in advanced Physics and Mathematics. I just wanted to initiate a discussion to see other people's opinions on a simple statement. I am fully aware of many processes that create order from disorder, like crystalization, nuclear fusion etc. Just because I ask a question based on a simplified assumption, does not mean that I stopped in the 7th grade....
Originally posted by Barcs
It's a comical watching somebody above like Squiz arguing with somebody who's an expert in the field about what certain things mean in molecular biology and genetics when his argument about ID is completely based on his own personal opinion, but he presents it as if it were science and arguing against it is ridiculous.
Originally posted by squiz
BTW the eye story is just a story, sounds plausible but it's just a story and doesn't line up with the historical record. It is sad when people accept stories as science. You should feel bad.edit on 22-1-2013 by squiz because: (no reason given)
It is often argued from an evolutionary perspective that this does not violate the second law of thermodynamics because it is proposed that the entropy of a non-isolated system could reduce due to energy input from an outside source, especially the sun when considering the earth as a biotic system. By this it is proposed that a particular system can become organised at the expense of an increase in entropy elsewhere. However, whilst this argument works for structures such as snowflakes that are formed by natural forces, it does not work for genetic information because the information system is composed of machinery which requires precise and non-spontaneous raised free energy levels – and crystals like snowflakes have zero free energy as the phase transition occurs.
Originally posted by squiz
He just also happens to be a professor of thermodynamics and combustion theory.
Originally posted by squiz
Originally posted by rhinoceros
It's not a good design argument because you can not explain why the degeneracy is so 'strong' with abiotic amino acids and 'weak' with biotic amino acids. It's an excellent evolution argument. Further still, it points that early on only the first two nucleotides of a codon mattered as is the case with most mitochondria today (mitochondrial genetic systems have sort of made a full circle from simple to complex and then back to simple).
Oh please. Because I can't say exactly why does not impact the design argument one bit. What sort of logic is that? The fact is the state of degeneracy as it stands is a marvel of engineering logic. And that makes it a bad design argument? Yeah right....
Originally posted by Dispo
Originally posted by squiz
He just also happens to be a professor of thermodynamics and combustion theory.
Your education and experiences allow you to make valid points.
Your education and experiences do not make your points valid.
Originally posted by rhinoceros
But it does impact the design argument, because there's no valid reason for it from a design point of view.
However, in the context of the evolving code, it makes a lot of sense.
...the standard alphabet exhibits better coverage (i.e., greater breadth and greater evenness) than any random set for each of size, charge, and hydrophobicity, and for all combinations thereof. In other words, within the boundaries of our assumptions, the full set of 20 genetically encoded amino acids matches our hypothesized adaptive criterion relative to anything that chance could have assembled from what was available prebiotically.
Whether we consider a starting point of genetic coding within (i) the pool of prebiotically plausible amino acids, (ii) the end point of the standard alphabet relative to this prebiotic pool of candidates, or (iii) the process by which evolution escaped these prebiotic boundaries, we see a consistent, unambiguous pattern; random chance would be highly unlikely to represent the chemical space of possible amino acids with such breadth and evenness in charge, size, and hydrophobicity (properties that define what protein structures and functions can be built). Further analysis indicated that, even under this simple criterion, any selection of an optimal amino acid alphabet is likely to include some of those found within contemporary genetic coding.
The last universal common ancestor of contemporary biology (LUCA) used a precise set of 20 amino acids as a standard alphabet with which to build genetically encoded protein polymers. Considerable evidence indicates that some of these amino acids were present through nonbiological syntheses prior to the origin of life, while the rest evolved as inventions of early metabolism. However, the same evidence indicates that many alternatives were also available, which highlights the question: what factors led biological evolution on our planet to define its standard alphabet? One possibility is that natural selection favored a set of amino acids that exhibits clear, nonrandom properties--a set of especially useful building blocks. However, previous analysis that tested whether the standard alphabet comprises amino acids with unusually high variance in size, charge, and hydrophobicity (properties that govern what protein structures and functions can be constructed) failed to clearly distinguish evolution's choice from a sample of randomly chosen alternatives. Here, we demonstrate unambiguous support for a refined hypothesis: that an optimal set of amino acids would spread evenly across a broad range of values for each fundamental property. Specifically, we show that the standard set of 20 amino acids represents the possible spectra of size, charge, and hydrophobicity more broadly and more evenly than can be explained by chance alone.
The significance of this extends further, for the researchers also go after the eight prebiotically plausible amino acids which are found among the 20 which are currently exhibited in biological proteins. They compared the properties of these amino acids with alternative sets of eight drawn randomly, establishing -- once again -- the fundamentally non-random nature of those utilized.
Originally posted by squiz
Originally posted by rhinoceros
But it does impact the design argument, because there's no valid reason for it from a design point of view.
Really?? wow. Adaptability, robustness etc.. Unbeleivable. The result is a marvel of engineering logic. You have no explanation for it except to say evolution done it.