One of the20 blocks from which proteins tend to be assembled. Isoleucine, leucine, lysine, phenylalanine, threonine, tryptophan, and valine are deemed 'essential' amino acids considering that the human anatomy cannot make them as well as must be obtained inside diet. Proteins are occasionally taken orally in product form.
organic substances containing an amino team and a carboxylic acid group
substance containing both an amino and a carboxylic acid group.The --NH2group.