Which vitamin acts as a cofactor for the enzyme delta-aminolevulinic acid synthase, involved in the biosynthesis of heme?

A Vitamin E
B Vitamin K
C Vitamin B12
D Vitamin B6 ✓

Explanation

Vitamin B6 acts as a cofactor for the enzyme delta-aminolevulinic acid synthase, which is involved in the biosynthesis of heme.

Source

Harper's Illustrated Biochemistry
Vitamins Biochemistry Porphyrin Metabolism Hard MEDICAL Confidence: high