gpalpha iib 《英文msh词典》GPalpha IIb ; [入口词] GPalpha IIb ; [主题词] Platelet Membrane Glycoprotein IIb ; [英文释义] Platelet membrane glycoprotein IIb is an integrin alpha subunit that heterodimerizes with INTEGRIN BETA3 to form PLATELET GLYCOPROTEIN GPIIB-IIIA COMPLEX. It is synthesized as a single polypeptide chain which is then postranslationally cleaved and processed into two disulfide-linked subunits of approximately 18 and 110 kD in size.