Question
Explain the physiological roles of Vitamin K in blood coagulation.
Answer :
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Vitamin K is a fat-soluble vitamin that plays a crucial role in the process of blood coagulation, ensuring proper hemostasis in the human body. One of its primary physiological roles is the activation of specific clotting factors synthesized in the liver. Vitamin K acts as a cofactor for the enzyme γ-glutamyl carboxylase, which catalyzes the carboxylation of glutamic acid residues on clotting factors II (prothrombin), VII, IX, and X. This carboxylation allows these proteins to bind calcium ions, an essential step for their proper functioning in the coagulation cascade. Without this modification,
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