mammalian proglucagon , which is synthesized in the neuroendocrine l-cells of the intestine and the alpha-cells of the pancreas , contains within its structure the sequences of glucagon and two glucagon-like peptides ( glp-i and glp-ii ) flanked at their amino and carboxyl termini by dibasic residues .
C0072092
proglucagon
C0017687
glucagon