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F11 / FXI / Factor XI

coagulation factor XI

F11 / FXI / Factor XI is coagulation factor XI of the blood coagulation cascade. This protein is present in plasma as a zymogen, which is a unique plasma coagulation enzyme because it exists as a homodimer consisting of two identical polypeptide chains linked by disulfide bonds. During activation of the plasma factor XI, an internal peptide bond is cleaved by factor XIIa (or XII) in each of the two chains, resulting in activated factor XIa, a serine protease composed of two heavy and two light chains held together by disulfide bonds. This activated plasma factor XI triggers the middle phase of the intrisic pathway of blood coagulation by activating factor IX. Defects in this factor lead to Rosenthal syndrome, a blood coagulation abnormality.

Gene Name: coagulation factor XI
Family/Subfamily: Protease , Serine S1
Synonyms: F11, Coagulation factor XI, Factor xi deficiency, F11 deficiency, Factor XI, PTA deficiency, PTA, Rosenthal syndrome, FXI
Target Sequences: NM_000128 NP_000119.1 P03951

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PLEASE NOTE

For RESEARCH USE ONLY. Intended for use by laboratory professionals. Not intended for human diagnostic or therapeutic purposes.

The data on this page has been compiled from LifeSpan internal sources, the National Center for Biotechnology Information (NCBI), and The Universal Protein Resource (UniProt).