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Pernicious Anemia to Crystalline
Quantitation of Cobalamins in Human Serum
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A. W. Johnson acetic Acta adenosyl adenosylcobalamin AdoCbl alkyl halides alkylcobalamins aqueous axial ligands bands benzimidazole Biochem Biol Biophys bond lengths carbon carbon—cobalt bond chelates Chem chemical chemistry chloride cleavage co-workers Co—C bond Co(II cob(II)alamin cobalamin cobaloximes cobalt cobalt atom cobalt(II cobinamide cobyric acid cobyrinic coenzyme compounds coordination corrin ring corrinoids crystal cyanide cyanocobalamin D. C. Hodgkin decomposition derivatives effect electron enzyme equation equatorial ligand equilibria ester formation G. N. Schrauzer H. P. C. Hogenkamp homolysis hydrogen hydrolysis intermediate J. M. Pratt lactone mechanism methanol methyl groups methylcobalamin mixture molecule nucleophiles nucleotide observed obtained organocobalt complexes oxidation photolysis plane porphyrin propionamide proton pyridine radical react reaction Reagents rearrangement reduction resonances shermanii side chains sirohydrochlorin solution solvent spectra spectrum stable steric steric effects structure studies substitution substrate synthesis Table tion trans transition uro'gen-III vitamin B12 X-ray yield