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Molecular Biology-Methionine

lgreen1031
in Homework Help

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Hello! I'm new to this forum and I need help understanding a homework problem that I have;

 

You have just purified a peptide that might stimulate nerve cells to grow in culture. You decide to isolate the peptide and determine its amino acid sequence:
H2N-trp-ala-lys-ser-thr-ser-met-cys-COOH

 

Why is methionine not the first amino acid in the peptide?

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