XPAT® | Pro-XTEN Platform | T Cell Engagers | Amunix … Our clinically validated PRO-XTEN™ technology platform enables us to discover and develop conditionally active T cell engagers and cytokine therapies that may be transformative for … Our clinically validated PRO-XTEN™ technology platform enables us to discover and develop conditionally active T cell engagers and cytokine therapies that may be transformative for …