Cobalamins

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Cobalamins

natural biologically active organic cobalt compounds.

The structural base of the cobalamins is a corrin ring consisting of four pyrrole nuclei in which the nitrogen atoms are bonded to a central cobalt atom. The three most well known cobalamins, which differ in the type of substituent for the cobalt atom, are cyanocobalamin, or vitamin B₁₂, and its coenzymes methylcobalamin and 5’-deoxyadenosylcobalamin. Vitamin B₁₂ is a metabolic product of intestinal flora. In man or animals, avitaminosis B₁₂ develops if the absorption of B₁₂ is impaired for any reason. Cobalamins are deposited in the liver in the form of 5’-deoxyadenosylcobalamin, which takes part in a number of enzymic reactions that are accompanied by intramolecular rearrangements. Methylcobalamin is involved in the biosynthesis of the amino acid methionine, methane, and acetic acid. Vitamin B₁₂ is produced industrially by microbiological synthesis.

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No references found			Cobalamins are found in meat, meat products, poultry, fish, clams, oysters, and eggs. What Are the Functions of Vitamin B12 (Cobalamins)? by Robert Baird / Health, general community The newer technique for quantifying cobalamins uses one of two separation methods. New technique for measuring vitamin B12 components by Emerging Food R&D Report Nexo E: Characterization of the cobalamins attached to transcobalamin I and transcobalamin II in human plasma. Cobalamin pseudodeficiency due to a transcobalamin I deficiency by McKnight, Jerry T. / Southern Medical Journal			coaxial filter coaxial hybrid Coaxial Hydroturbine coaxial input coaxial isolator coaxial line coaxial machine gun Coaxial Magnetron coaxial planes coaxial relay coaxial speaker coaxial stub coaxial switch coaxial transistor coaxial transmission line coaxial wavemeter coaxial-cylinder magnetron coaxial-line resonator coaxially fed linear array coaxing cob cob wall cobaea vine Cobain, Kurt cobalamin Cobalamins Cobalt Cobalt Alloys cobalt bloom cobalt blue cobalt bomb cobalt bromide cobalt chloride cobalt glance cobalt nitrate cobalt ocher Cobalt Ores cobalt oxide cobalt potassium nitrite cobalt pyrites cobalt sulfate cobalt therapy cobalt trifluoride cobalt ultramarine cobalt yellow cobalt-60 cobalt-beam therapy cobalt-molybdate desulfurization cobaltic fluoride Cobaltite cobaltocalcite			Cob loaf Cob money Cob nob Cob nob cob wall COB-NET Coba COBAA COBAAA CoBAB COBAC COBAD COBAE Cobaea cobaea vine COBAES Cobain, Kurt COBAK COBAL cobalamin cobalamin cobalamin cobalamin cobalamin deficiency cobalamin vitamin cobalamin vitamin cobalamin vitamin cobalamine cobalamine cobalamine Cobalamins COBALLT cobalt cobalt cobalt cobalt cobalt cobalt Cobalt (color) Cobalt (color) Cobalt (element) Cobalt (element) Cobalt (element) cobalt 57 cobalt 57 cobalt 57 cobalt 60 cobalt 60 cobalt 60 Cobalt 60 (band) Cobalt Alloys Cobalt arsenic sulfide Cobalt arsenic sulfide cobalt bloom cobalt bloom cobalt blue cobalt blue Cobalt blue (comic) Cobalt blue (comic) Cobalt Blue Prairie Rag Rug Cobalt bomb

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