<unk>  <unk>  is derived from the transcription product of the proglucagon gene. The major source of<unk>  in the body is the intestinal L cell that secretes<unk>  as a gut hormone. The biologically active forms of<unk>  are:<unk> -(7-37) and<unk> -(7-36)NH2.<unk>  secretion by L cells is dependent on the presence of nutrients in the lumen of the small intestine.  The secretagogues (agents that causes or stimulates secretion) of this hormone include major nutrients<unk>  carbohydrate, protein and lipid. Once in the circulation,<unk>  has a half life of less than 2 minutes, due to rapid degradation by the enzyme dipeptidyl peptidase-4.
Glucagon-like peptide-1
Histrelin
C-peptide
Growth hormone-releasing hormone
Thyrotropin alpha
Bryostatin
Pentostatin
Secretin human