Which protein is most responsible for the transport of vitamin B₁₂ to target cells in the body?

Question

Quizplus · Accepted Answer

Holotranscobalamin II protein is important in the delivery of vitamin B₁₂ to all cells needing it. Although only 25% of the vitamin B₁₂ is bound to TC II, lack of TC II develops into megaloblastic anemia. Haptocorrin, or TC I, binds about 75% of the circulating vitamin B₁₂. Intrinsic factor is involved with the transport and absorption of vitamin B₁₂ in the GI tract.

Which Protein Is Most Responsible for the Transport of Vitamin