Domain V of beta2-glycoprotein I binds factor XI/XIa and is cleaved at Lys317-Thr318.
Shi T, Giannakopoulos B, Iverson GM, Cockerill KA, Linnik MD, Krilis SA. Domain V of beta2-glycoprotein I binds factor XI/XIa and is cleaved at Lys317-Thr318. J Biol Chem. 2005 Jan 14; 280(2):907-12.