PACAP-38 is a hypothalamic peptide that affects anterior pituitary cell function. It also plays a key role in the embryogenesis of brain, protection of brain nerve cells from ischemia-induced death, injuring and apoptosis. Amino Acid Sequence His-Ser-Asp-Gly-Ile-Phe-Thr-Asp-Ser-Tyr-Ser-Arg-Tyr-Arg-Lys-Gln-Met-Ala-Val-Lys-Lys-Tyr-Leu-Ala-Ala-Val-Leu-Gly-Lys-Arg-Tyr-Lys-Gln-Arg-Val-Lys-Asn-Lys-NH2