title: Cooperative Ca2+ binding to human factor IX. Effects of Ca2+ on the kinetic parameters of the activation of factor IX by factor XIa.
mesh_terms: D000818:Animals; D002118:Calcium / Q000494:pharmacology*; D002417:Cattle; D004789:Enzyme Activation; D005164:Factor IX / Q000302:isolation & purification / Q000378:metabolism*; D005172:Factor XI / Q000302:isolation & purification / Q000378:metabolism*; D015945:Factor XIa; D006801:Humans; D007700:Kinetics
chemical_list: D005164:Factor IX; D005172:Factor XI; D015945:Factor XIa; D002118:Calcium