What vitamin is needed for coagulation of blood and what must happen for it to be functional?
A) vitamin D, a co-translational modification of serine.
B) vitamin K, a posttranslational carboxylation of glutamate.
C) vitamin K, a co-translational carboxylation of aspartate.
D) vitamin D, a posttranslational glycosylation of serine.
E) vitamin E, a posttranslational glycosylation of tyrosine.

Question

Quizplus · Accepted Answer

Vitamin K is needed for the coagulation of blood and it functions by posttranslational carboxylation of glutamate residues in clotting factors, which allows them to bind calcium and form clots. Vitamin D and vitamin E do not play a role in blood coagulation, and co-translational modifications of serine and aspartate are not involved in vitamin K-dependent blood clotting.

What Vitamin Is Needed for Coagulation of Blood and What