Which of the following cations is required for the conversion of Prothrombin into active thrombin by thromboplastin?

Which of the following cations is required for the conversion of Prothrombin into active thrombin by thromboplastin?

Q. Which of the following cations is required for the conversion of Prothrombin into active thrombin by thromboplastin? (Blood coagulation Step)

A.            Ca

B.            Fe

C.            Mg

D.            Mn

Answer: Ca

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