Limiting amino acid in maize:: (A) Niacin, (B) Tyrosine, (C) Tryptophan, (D) Methionine
Answer is C. Maize protein Zein lacks tryptophan. As tryptophan is required for the synthesis of Niacin (60 mg of tryptophan is required to make 1 mg of niacin) Hence, In high corn diet, requirement of dietary niacin increases.