Biochemistry
Phylloquinone is an electron acceptor during photosynthesis, forming part of the electron transport chain of Photosystem I.
Its best-known function in animals is as a cofactor in the formation of coagulation factors II (prothrombin), VII, IX, and X by the liver. It is also required for the formation of anticoagulant factors protein C and S. It is commonly used to treat warfarin toxicity, and as an antidote for coumatetralyl.
Vitamin K is also required for bone protein formation.
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