IXXB_BOTJA Coagulation factor IX/factor X-binding protein subunit B (Fragment) DCPSDWSPYEGHCYRVFTEPQNXADAEKFC 30 Anticoagulant protein which binds to the gamma- carboxyglutamic acid-domain regions of factors IX and factor X in the presence of calcium with a 1 to 1 stoichiometry (By similarity).