Acidic peptide of the lens. Carba analog of reduced glutathione. Ophthalmic acid could be used as a biomarker in oxidative stress.ONE-LETTER SEQUENCE: gamma-E-Abu-GMOLECULAR FORMULA: C11H19N3O6MOLECULAR WEIGHT:289.29STORAGE CONDITIONS: -20 5C, CAS REGISTRY NUMBER: [495-27-2], RESEARCH AREA: MiscellaneousREFERENCES: S.G.Waley, Biochem. J., 68, 189 (1958); T.Soga et al., J. Biol. Chem., 281, 16768 (2006)