[pSer2, pSer5, pSer7]-CTD (TFA) is a substrate for CDK7(cyclin-dependent protein kinase), a phosphorylated polypeptide at ser2, ser5, and ser7 of RNA polymerase II carboxyl terminus (CTD).

(Trp63,Trp64)?-?C3a(63-77) is a C3a synthetic analogue peptide, which exhibits Ca2+ stimulating efficacy in human neutrophils and hC3aR or mC3aR expressing RBL-2H3 cells with EC50 of 9.5, 2.0 and 0.8 nM, respectively.

Kemptide (Phospho-Ser5) is a phosphoreceptor peptide that is a specific substrate for camp-dependent protein kinase (PKA).