Cottrell et al., Essays Biochem 2002
(Inflammation) :
Thrombin activates PAR1, PAR3 and PAR4, trypsin activates PAR2 and PAR4 , and mast cell tryptase activates PAR2 in this manner
Arachiche et al., PloS one 2013
:
However, PAR4 is a relatively poor thrombin substrate and requires PAR3 as a cofactor at low thrombin concentrations ... In this study we show that PAR3 also regulates PAR4 signaling