<prompt> Maize is deficient in which amino acidLeucineMethionineTryptophanPhenylalanine  <response>: The proteins of maize are deficient in tryptophan and lysine; while some strains contain an excess of leucine. Excess of leucine or deficiency of tryptophan causes decreased synthesis of niacin in the body. This explains the pellagragenic action of maize. 