HAEGTFTSD is the first N-terminal 1-9 residues of GLP-1 peptide.The GLP-1 (7-36) amide is a product of the preproglucagon gene, which is secreted from intestinal L-cells, in response to the ingestion of food.
N-Acetyl-α-Endorphin is a chemical compound consisting of α-Endorphin that has been acetylated at the N-terminal. α-Endorphin, in turn, is an endogenous opioid peptide.