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