one form obtained with baso ( 4 ) of density 2g/ml behaved as if it had a molecular weight of 39000 and possessed preformed clotting activity ( factor xa ) , whereas that of the form adsorbed with baso ( 4 ) of density 1g/ml had a molecular weight of 69000 and consisted of inactive factor x precursor .
C0015520
factor xa
C0015518
factor x