Crossword clue: an enzyme liberated from blood platelets that converts prothrombin into thrombin as blood starts to clot

The most common answer is thrombokinase (13 letters).

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

Possible answers

thrombokinase 13 letters wn-def

an enzyme liberated from blood platelets that converts prothrombin into thrombin as blood starts to clot

thromboplastin 14 letters wn-def

an enzyme liberated from blood platelets that converts prothrombin into thrombin as blood starts to clot