NCIt definition : Coagulation factor XI (625 aa, 70 kDa) is encoded by the human F11 gene. This protein
is involved in the proteolytic activation of coagulation factor IX.;
NCIt note : Coagulation factor XI is a single chain zymogen that is cleaved after the arginine
at amino acid residue 387 into two chains by activated coagulation factor XII. The
active form of factor XI is composed of two heavy and two light chains held together
by disulfide bonds.;