is tautomer of serine amino acid zwitterion serine zwitterion 105.04259 An amino acid zwitterion obtained by transfer of a proton from the carboxy to the amnio group of serine. 105.09262 0 Gmelin:2060272 Beilstein:3935647 [NH3+]C(CO)C([O-])=O CHEBI:35243 InChI=1S/C3H7NO3/c4-2(1-5)3(6)7/h2,5H,1,4H2,(H,6,7) chebi_ontology serine zwitterion MTCFGRXMJLQNBG-UHFFFAOYSA-N 2-ammonio-3-hydroxypropanoate C3H7NO3