glutamine glutaminium CHEBI:32679 C5H11N2O3 glutaminium H2gln(+) +1 glutamine cation chebi_ontology 4-amino-1-carboxy-4-oxobutan-1-aminium An alpha-amino-acid cation that is the conjugate acid of glutamine, arising from protonation of the amino group. 147.15252 NC(=O)CCC([NH3+])C(O)=O 147.07642 ZDXPYRJPNDTMRX-UHFFFAOYSA-O InChI=1S/C5H10N2O3/c6-3(5(9)10)1-2-4(7)8/h3H,1-2,6H2,(H2,7,8)(H,9,10)/p+1 alpha-amino-acid cation