Glutamic acid molecule.
Glutamic acid, COOH(CH2)2CH(NH2)COOH, is a colorless amino acid. One of the functions of glutamic acid is to increase the solubility of its associated proteins by providing them with one negative charge. It also helps in the removal of toxic ammonia from the body. Its sodium salt (sodium glutamate) is used as a food flavoring. See also glutamine.