ML161 (Parmodulin 2) ML161 (Parmodulin 2) is an allosteric inhibitor of PAR1 with IC50 of 0.26 μM. In vitro
ML-161 is an allosteric inhibitor of PAR1. ML-161 displays dose-dependent inhibition of thrombin-induced platelet activation, as measured by P-selectin expression. ML-161 displays selective inhibition of SFLLRN and thrombin-induced platelet aggregation, both of which operate via PAR1, and has no effect on AYPGKF, thromboxane, or ADP-induced platelet aggregation, which are all agonists at alternative platelet GPCRs.