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Protein sequencing and amino acids

Genetics as it applies to evolution, molecular biology, and medical aspects.

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Protein sequencing and amino acids

Postby rikajaj » Sat Sep 15, 2007 4:38 am

If every protein is composed of a specific sequence of amino acids, how is it that the protein myoglobin in humans has a different sequence than the protein myoglobin in horses?
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Postby mith » Sat Sep 15, 2007 5:42 am

Because proteins aren't named according to their sequences?
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Postby MrMistery » Sat Sep 15, 2007 6:31 am

well actually they do not have the same name. you need to look up what protein families and superfamilies are. no 2 proteins will bear the same name and still have different amino acid sequences.
So, even if we call hemoglobin the same regardless which one of the 2 million alleles a particular person has, the correct way to call it would be something like Human_hemoglobin for the one designed as the "normal one" and Human_hemoglobin61Y for the one with a tyrosine at 61. Now i just made up that naming system, but the official one is similar in principle.
It really depends if you are a biology student, a physiologist, a doctor or a biochemist. they each refer to them differently.
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