What salivary protein is important for the transport of dietary vitamin B₁₂ to the small intestine?

Question

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Haptocorrin is a salivary protein that binds to vitamin B12 and helps transport it to the small intestine for absorption. Trypsin is a pancreatic enzyme that helps to digest proteins. IF (intrinsic factor) is a protein produced in the stomach that is necessary for the absorption of vitamin B12. Transcobalamin II is a protein that binds to and transports vitamin B12 in the blood after it has been absorbed in the small intestine.

What Salivary Protein Is Important for the Transport of Dietary