is tautomer of D-tyrosine D-tyrosine zwitterion 0 MetaCyc:D-TYROSINE InChI=1S/C9H11NO3/c10-8(9(12)13)5-6-1-3-7(11)4-2-6/h1-4,8,11H,5,10H2,(H,12,13)/t8-/m1/s1 (2R)-2-ammonio-3-(4-hydroxyphenyl)propanoate chebi_ontology [NH3+][C@H](Cc1ccc(O)cc1)C([O-])=O CHEBI:58570 C9H11NO3 181.18850 181.07389 A D-alpha-amino acid zwitterion that is D-tyrosine in which a proton has been transferred from the carboxy group to the amino group. It is the major species at pH 7.3. OUYCCCASQSFEME-MRVPVSSYSA-N D-tyrosine D-alpha-amino acid zwitterion