N-terminal N-methyl-L-seryl-L-prolyl-L-lysyl(2+) residue
n-terminal n-methyl-l-seryl-l-prolyl-l-lysyl(2+) residue
A cationic peptidyl group obtained by protonation of the two amino groups of <em>N</em>-methyl-<small>L</small>-seryl-<small>L</small>-prolyl-<small>L</small>-lysyl residue. Major microspecies at pH 7.3