initial rates of trichloroacetic acid-soluble 3h-release were linear over 10-30 min of incubation of factor ix ( 88 nm ) with cacl2 ( 5 mm ) and with pure ( greater than 98 % ) factor xia ( 0.06-1.3 nm ) , which was prepared by incubating human factor xi with bovine factor xiia .
C0015524
factor xia
C0015522
factor xi