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Cytachrome C and neutral drift

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Author Topic:   Cytachrome C and neutral drift
NosyNed
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Message 4 of 26 (193529)
03-22-2005 8:21 PM 		Reply to: Message 3 by judge
03-22-2005 8:05 PM

Darned good question!
I wonder what the answer is?
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Page Not Found | University of Chicago
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This paper shows the sequences for a wide range of mammels.. Just looking at it suggests to me that the differences are not a result of drift but are specific fixed mutations. That is the differences are small. It looks like something is conserving the sequences.
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It might be that you original supposition is wrong but I sure don't know.
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This message has been edited by NosyNed, 03-22-2005 08:37 PM
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NosyNed
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Posts: 9004
From: Canada
Joined: 04-04-2003

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Message 7 of 26 (193570)
03-23-2005 12:28 AM 		Reply to: Message 6 by judge
03-22-2005 11:21 PM

First, just because all versions of cytochrome C do basically the same job, it does not follow that there are no functional differences between them. For example (based on zero knowledge of the details of this particular protein), two versions might function best at two different temperatures. So more than drift might be involved -- but most of the observed differences probably are due to drift.
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So if they are functionally different and even some differences are not due to neutral drift, can Cytochrome C be used as evidence for common descent?
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I don't understand what the issue is here? Could you explain what the perceived problem is?
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NosyNed
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Posts: 9004
From: Canada
Joined: 04-04-2003

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Message 9 of 26 (193574)
03-23-2005 12:52 AM 		Reply to: Message 8 by judge
03-23-2005 12:46 AM

Help? From me?
I don't know anything like enough genetics to be able to help.
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I could guess but we would be better to wait for others.
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Meanwhile have a look at the pdf referenced in msg 4. It lists the genetic differences in cytachrome C for two or three dozen species.
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There seems to be a pattern.
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NosyNed
Member
Posts: 9004
From: Canada
Joined: 04-04-2003

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Message 20 of 26 (193788)
03-23-2005 8:39 PM 		Reply to: Message 16 by Wounded King
03-23-2005 5:22 AM

Oxidase
Oh well I did disclaim to death about my knowledge.
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It seems reading should have been included. Thanks.
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