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Name the amino acid which does not take part in transamination during amino acid catabolism.

(a) Proline

(b) Threonine

(c) Lysine

(d) Serine

This question was addressed to me in a national level competition.

My question is based upon Amino Acid Metabolism in section Bioenergetics and Metabolism of Life Sciences

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The correct choice is (d) Serine

Explanation: Except serine rest three amino acids i.e. proline, threonine, and lysine take part in transamination during amino acid catabolism. Amino group donor is specific and called aminotransferase while acceptor is almost always α-ketoglutarate.

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