It occurs primarily in proteins involved in the blood clotting cascade, specifically factors II, VII, IX, and X, protein C, and protein S, and also in some bone proteins. This modification is required for these proteins to function.
It primarily occurs in proteins that participate in the coagulation process, particularly those involved in blood clotting like factors II, VII, IX, and X, protein C, and protein S, as well as certain bone-related proteins. This modification is essential for these proteins to function properly.