. "Hydroxocobalamin"@en . . . "Vitamin B12 exists in four major forms referred to collectively as cobalamins; deoxyadenosylcobalamin, methylcobalamin, hydroxocobalamin, and cyanocobalamin. Two of these, methylcobalamin and 5-deoxyadenosyl cobalamin, are primarily used by the body. Methionine synthase needs methylcobalamin as a cofactor. This enzyme is involved in the conversion of the amino acid homocysteine into methionine. Methionine in turn is required for DNA methylation. 5-Deoxyadenosyl cobalamin is a cofactor needed by the enzyme that converts L-methylmalonyl-CoA to succinyl-CoA. This conversion is an important step in the extraction of energy from proteins and fats. Furthermore, succinyl CoA is necessary for the production of hemoglobin, the substances that carries oxygen in red blood cells."@en . . . . . . . . . "Readily absorbed from the gastrointestinal tract, except in malabsorption syndromes. Vitamin B12 is absorbed in the lower half of the ileum."@en . "Hydroxocobalamin"@en . "Very high (90%). Cobalamins are extensively bound to two specific plasma proteins called transcobalamin 1 and 2; 70% to transcobalamin 1, 5% to transcobalamin 2."@en . "13422-51-0"@en . "Takayuki Hirayama, Takashi Kiyota, \"Process for production of hydroxocobalamin.\" U.S. Patent US5338418, issued June, 1982."@en . . . "Vitamin B-12b"@en . . "# \"Link\":http://www.medsafe.govt.nz/profs/Datasheet/n/Neocytameninj.htm # Seetharam B, Yammani RR: Cobalamin transport proteins and their cell-surface receptors. Expert Rev Mol Med. 2003 Jun 13;5(18):1-18. \"Pubmed\":http://www.ncbi.nlm.nih.gov/pubmed/14585166"@en . . . . . . . . . . . . . . "Approximately 6 days (peak plasma concentration after 8-12 hours from oral administration)"@en . . "Humans and other mammals"@en . "approved"@en . . . . . . "Injectable form of vitamin B 12 that has been used therapeutically to treat vitamin B 12 deficiency. [PubChem]"@en . . . "For treatment of pernicious anemia and the prevention and treatment of vitamin B12 deficiency arising from alcoholism, malabsorption, tapeworm infestation, celiac, hyperthyroidism, hepatic-biliary tract disease, persistent diarrhea, ileal resection, pancreatic cancer, renal disease, prolonged stress, vegan diets, macrobiotic diets or other restrictive diets. Also for the treatment of known or suspected cyanide poisoning."@en . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "Each hydroxocobalamin molecule can bind one cyanide ion by substituting it for the hydroxo ligand linked to the trivalent cobalt ion, to form cyanocobalamin, which is then excreted in the urine."@en . . . "OH-Cbl"@en . " "@en . . "Hydroxycobalamin"@en . . .