(5R)-5-(beta-D-galactosyloxy)-L-lysine(1+) residue
(5r)-5-(beta-d-galactosyloxy)-l-lysine(1+) residue
An α-amino-acid cation residue obtained by protonation of the side-chain amino group of (5<i>R</i>)-5-(β-<small>D</small>-galactosyloxy)-<small>L</small>-lysine residue; major species at pH 7.3.