Protein Kinase C (19-31) TFA, a peptide inhibitor of protein kinase C (PKC), derived from the pseudo-substrate regulatory domain of PKCa (residues 19-31) with a serine at position 25 replacing the wild-type alanine, is used as protein kinase C substrate peptide for testing the protein kinase C activity.

Apelin-12 是多肽中最有效的 C 端片段之一，对孤儿受体 APJ 受体具有很高的亲和力。Apelin-12 参与体液平衡的调节和摄食的中枢控制。Apelin-12 阻断HIV-1通过 APJ 受体进入。Apelin-12 具有神经保护作用。

Erythrivarone A 是从 Erythrina variegate 的茎皮中分离得到的异黄酮。