Utunumsint
Posts: 103
Joined: Jan. 2010
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| Quote (Zachriel @ Jan. 28 2010,20:24) | | Quote (afarensis @ Jan. 28 2010,18:45) | | Zhang's work on digestive Rnases in ruminants and colobines - such as this article - seems relevant here. Although I have never heard it mentioned. |
Zhang provides a good summary of a few basic principles.
| Quote | | These results suggest that (1) an evolutionary problem can have multiple solutions, (2) the same amino acid substitution may have opposite functional effects in homologous proteins, (3) the stochastic processes of mutation and drift play an important role even at functionally important sites, and (4) protein sequences may diverge even when their functions converge. |
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I had some time to look over your comments. So I gather that Behe and IDers are not bothered by Lenski's results because the results are within the parameters defined by Behe in the Edge for what falls within the possibility of Darwinian evolution. In other words, it hasn't crossed the edge.
They also cry foul because it took an artificially created ecological niche to make the transition happen.
I guess my follow up question, given that I can't understand the Zhang quote :), is how likely is it for the e-coli to develop a new functionality through three mutations, to reach a functional combination not accessible to single, or even double mutations? Whether it be two neutral mutations potentiating a third selectable mutation...
You may notice that I'm trying to use jargon that I barely understand, so bear with me if I'm being obtuse. :)
Cheers,
Ut
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