Limiting amino acid in maize:
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.
Niacin
Tyrosine
Tryptophan
Methionine
Tryptophan metabolism detail