- A naturally occurring Tyr143His alpha IIb mutation abolishes alpha IIb beta 3 function for soluble ligands but retains its ability for mediating cell adhesion and clot retraction: comparison with other mutations causing ligand-binding defects. Kiyoi, T., Tomiyama, Y., Honda, S., Tadokoro, S., Arai, M., Kashiwagi, H., Kosugi, S., Kato, H., Kurata, Y., Matsuzawa, Y. Blood (2003)