Vitamin B6 (an aldehyde) reacts with an enzyme (partial structure shown below) to form a c...

Vitamin B6 (an aldehyde) reacts with an enzyme (partial structure shown below) to form a coenzyme that catalyzes the conversion of α-amino acids to α-keto acids.

a. Draw the structure of the coenzyme.

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b. α-Amino acids have the general structure shown below. Draw the structure of an α-keto acid.