Product Description | PACAP-27, the N-terminal fragment of PACAP-38, is a neuropeptide originally isolated from bovine hypothalamus, but is also found in humans and rats. It shows considerable homology with Vasoactive Intestinal Polypeptide (VIP), but stimulates adenylate cyclase much more potently than VIP. PACAP27 and PACAP38 stimulate cAMP accumulation and increase [Ca2+]i through the type I PACAP receptors |
Scientific Background | [Arg14,20,21, Leu16]-PACAP (1-27), amide, human, ovine, rat is a 27-residue synthetic peptide with the sequence His-Ser-Asp-Gly-Ile-Phe-Thr-Asp-Ser-Tyr-Ser-Arg-Tyr-Arg-Arg-Gln-Leu-Ala-Val-Arg-Arg-Tyr-Leu-Ala-Ala-Val-Leu. C-terminal amidation removes the terminal carboxylate charge. The sequence contains 0 Lys and 5 Arg residues, contributing cationic character; contains 4 aromatic residues that can contribute to hydrophobic or aromatic interactions; has a relatively high hydrophobic-residue fraction that can influence aqueous solubility and surface adsorption. These sequence-derived properties describe the reagent chemically; no specific receptor, enzyme, pathway, disease association, or biological activity is assigned without product-specific experimental evidence. |
Experimental Notes | Sequence-derived chemical properties support reagent selection and experimental planning but do not establish biological function. Solubility, aggregation, adsorption, conjugation efficiency, and assay performance should be validated under the intended experimental conditions. |
