N-(4-ammoniobutylidene)-L-lysinium(2+) residue
n-(4-ammoniobutylidene)-l-lysinium(2+) residue
An α-amino-acid residue cation obtained by protonation of the amino and imino nitrogens of <em>N</em>-(4-aminobutylidene)-<small>L</small>-lysine residue; major species at pH 7.3