Which of the following proteins initiates the polypeptide chain?
-
Glycine
-
Leucine
-
Methionine
-
Lysine
-
None of these
C
Correct answer
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.