N-terminal L-glutamyl-L-glutamyl-L-glutamyl(2-) residue
n-terminal l-glutamyl-l-glutamyl-l-glutamyl(2-) residue
N-terminal <small>L</small>-Glu-<small>L</small>-Glu-<small>L</small>-Glu residue; major microspecies at pH 7.3.