Expression of TULA family members in human and murine platelets and expression of GPVI signaling proteins in murine platelets. (A) Increasing amounts of human platelet and PBMC protein were blotted and probed for TULA family members or the loading control Erk. (B) TULA family protein expression is compared in wild-type and TULA-dKO murine platelets with HEK293T cells overexpressing each member as a positive control. (C) Relative expression of GPVI, Syk, and PLC-γ2 is compared between wild-type and TULA-dKO murine platelets.