3OSK: Crystal Structure Of Human Ctla-4 Apo Homodimer
reference: Rigid-body ligand recognition drives cytotoxic T-lymphocyte antigen 4 (CTLA-4) receptor triggering., Yu C, Sonnen AF, George R, Dessailly BH, Stagg LJ, Evans EJ, Orengo CA, Stuart DI, Ladbury JE, Ikemizu S, Gilbert RJ, Davis SJ, J Biol Chem. 2011 Feb 25;286(8):6685-96. Epub 2010 Dec 14. PMID: 21156796

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