Chemicals and Drugs

Prothrombin

A plasma protein that is the inactive precursor of thrombin. It is converted to thrombin by a prothrombin activator complex consisting of factor Xa, factor V, phospholipid, and calcium ions. Deficiency of prothrombin leads to hypoprothrombinemia.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

A plasma protein that is the inactive precursor of thrombin. It is converted to thrombin by a prothrombin activator complex consisting of factor Xa, factor V, phospholipid, and calcium ions. Deficiency of prothrombin leads to hypoprothrombinemia.

MeSH Record

Classification

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See Also

MeSH Record

Synonyms

7 entry terms
  • Blood Coagulation Factor II
  • Coagulation Factor II
  • Differentiation Reversal Factor
  • Factor II
  • Factor II, Coagulation
  • Factor, Differentiation Reversal
  • II, Coagulation Factor

MeSH Record

Aspects Covered

29 allowable subheadings

Indexed with the subheadings administration & dosage, adverse effects, agonists, analogs & derivatives, analysis, antagonists & inhibitors, biosynthesis, cerebrospinal fluid, chemical synthesis, chemistry, classification, drug effects, economics, genetics, history, immunology, isolation & purification, metabolism, pharmacokinetics, pharmacology, physiology, poisoning, radiation effects, standards, supply & distribution, therapeutic use, toxicity, ultrastructure, urine.

MeSH Record

Indexing Annotation

a blood coag factor; an enzyme precursor

MeSH Hierarchy

Tree Numbers

AMA Style

References

  1. National Library of Medicine. Prothrombin. Medical Subject Headings (MeSH). 2026. Unique ID D011516. http://id.nlm.nih.gov/mesh/2026/D011516
  2. Prothrombin. In: Wikidata. https://www.wikidata.org/wiki/Q548692