of 21 l-amino acids tested ( at 1.2 x 10 ( -4 ) m ) , only histidine and the aromatic amino acids ( phenylalanine , tryptophan , and tyrosine ) protect salmonella typhimurium strains from inhibition of growth and immediately reverse the growth inhibition by 5 x 10 ( -4 ) m 2-thiazole-dl-alanine .
C0301713
aromatic
C0041485
tyrosine