title: The origin and function of the transcobalamins.
mesh_terms: D000818:Animals; D001798:Blood Proteins / Q000378:metabolism*; D002352:Carrier Proteins / Q000378:metabolism; D006207:Half-Life; D011485:Protein Binding; D051381:Rats; D014805:Vitamin B 12 / Q000378:metabolism*
chemical_list: D001798:Blood Proteins; D002352:Carrier Proteins; D014805:Vitamin B 12