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Mixed Chemistry
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Which of the following proteins initiates the polypeptide chain?
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A
Methionine
💡 Explanation:
This option is correct because methionine amino acid is classified as non polar as it has a straight side chain that possesses a S-methyl thioether (i.e C-S-C bonding) at the gama-carbon. It is an essential amino acid in all metazoa. These are initiated by the polypeptide chain.