| Description | Ac-c[Cys-Glu-His-d-Phe-Arg-Trp-d-Cys]-Pro-Pro-Lys-Asp-NH2 (compound 5) is a selective hMC5R antagonist ligand with an IC50 of 10 nM[1] | Endomorphin 1 acetate, a high affinity, highly selective agonist of the µ-opioid receptor (Ki: 1.11 nM), displays reasonable affinities for kappa3 binding sites, with Ki value between 20 and 30 nM. Endomorphin 1 acetate has antinociceptive properties[1][2][4] | GGGYK-Biotin is a substrate peptide designed to study the substrate specificity of Sortase A. GGGYK-Biotin can be used to develop Sortase A variants with different substrate specificities[1] | PACAP (1-27), human, ovine, rat TFA (PACAP 1-27 TFA) is the N-terminal fragment of PACAP-38, and is a potent PACAP receptor agonist with IC50s of 3 nM, 2 nM and 5 nM for rat PAC1, rat VPAC1 and human VPAC2, respectively[1] | Pepsin is the major pig and human gastric proteases, it is a pepsin-like minor gastric proteolytic enzymes. Pepsin contributes to proteolysis of food proteins in the vertebrate stomach[1][2] |