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.
This modification mainly occurs in specific proteins that play a crucial role in the coagulation process, particularly those involved in blood clotting such as factors II, VII, IX, and X, protein C, and protein S, and also some bone-related proteins. These proteins require this modification to carry out their functions effectively.