What is activated factor X (Xa)?

Updated: Feb 06, 2020
  • Author: George Ansstas, MD; Chief Editor: Eric B Staros, MD  more...
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The letter "a" in front of any coagulant factor indicates active form of the factor.

Newer anticoagulants directly inhibit activated factor X (Xa).

In biochemistry, factor Xa protease may be used to cleave off protein tags that improve expression of a protein of interest.

Both prothrombin (PT) and partial thromboplastin time (PTT) are affected in marked deficiency of factor X.

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