6-Thio-GTP (tetrasodium)

6-Thio-GTP (tetrasodium) is a Vav1-Rac inhibitor. 6-Thio-GTP (tetrasodium) inhibits TCR-stimulated T cell proliferation and CD28-mediated T cell survival. 6-Thio-GTP (tetrasodium) has an immunosuppressive effect in a mouse cardiac allograft transplant model and prolongs cardiac allograft survival.