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Topic: Biochem - substitution mutation effects on polypeptides?  (Read 3061 times)

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Offline MissDee

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Biochem - substitution mutation effects on polypeptides?
« on: May 09, 2009, 05:06:27 PM »
A substitution mutation occurs in the fourth codon so that AAT becomes ACT. What is the effect on the polypeptide formed? Will it function? Explain.

I really can't figure out how to answer this question. My guess is that since the fourth codon is effected, the amino acid sequence wouldn't know to "Stop" or to continue on with the sequence. Anyone care to explain this to me?
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Offline MissDee

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Re: Biochem - substitution mutation effects on polypeptides?
« Reply #1 on: May 10, 2009, 10:00:59 PM »
Anyone?  :(
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Offline Arkcon

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Re: Biochem - substitution mutation effects on polypeptides?
« Reply #2 on: May 10, 2009, 11:40:13 PM »
Is codon a synonym for base?  What does ATT code for?  What does ACT code for?  I don't know the answer off hand, I would have to look it up.  But it's your assignment, you should look it up. 
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Hey, I'm not judging.  I just like to shoot straight.  I'm a man of science.
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