phenylalanine molecule, molecular structure, alpha-amino acid, ball and stick 3d model, structural chemical formula with colored

phenylalanine alphaamino acid proteinogenic amino acids glucogenic ketogenic dopamine agonists monoamine precursors molecule molecular structure chemical formula model c9h11no2 atom chemistry science protein compound illustration structural symbol biology biochemistry element icon nitrogen food composition education hydrogen metabolism supplement aromatic sign flat carbon medical oxygen alpha-amino ball stick colored atoms atoms