Endogenous peptide found predominately in the kidney and intestine. Displays similar selectivity for ETA and ETB endothelin receptors.

Src Inhibitor 3 is an effective inhibitor of c-terminal Src kinase (IC50 <3 nM in CSK HTRF, <4 nM in Caliper assay). Src Inhibitor 3 increases T cell proliferation induced by T cell receptor signaling.

PF-4840154 is a potent, selective agonist of the rat and human TrpA1 channel and elicited TrpA1-mediated nocifensive behaviour in mouse, with EC50 of 97 nM and 23 nM for rTrpA1 and hTrpA1, respectively.