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1981 (1)
1Author    Z. NaturforschRequires cookie*
 Title    Coa/Coß-Isomerie der am Kobalt methylierten Corrinoide. Über die CD-und ORD-Spektren einiger Isomerenpaare  
 Abstract    The CD and ORD spectra o f the Coar-and Co/?-methyl isomers o f cobalamin, 2-methylthio-adenyl cobamide (factor S), cobyric acid and /?-kresyl cobamide (factor lb) were recorded in water and acidic solution. In complete and incomplete (nucleotide free) (Coar-methyl)-corrinoids the axial ligands CH3 and HzO are unalterable (fixed) within a wide range o f pH (about 1 to 12) at room temperature in the dark. Thus the spectra in this pH range are constant at X > 350 nm; spectral differences at X < 350 nm are effects of the nucleotide bases. The spectra o f complete "base-on" (Co/?-methyl)-corrinoids are, like the spectra of (Coa-methyl)-corrinoids, at X > 350 nm not dependent on the nucleotide base. If the nucleotide base is not coordinated ("base-off'), the spectra change strikingly and at X > 350 nm are nearly identical with those o f incomplete corrinoids e. g. cobyric acid. 
  Reference    Z. Naturforsch. 36c, 497 (1981); eingegangen am 16. Oktober 1980/25. Februar 1981 
  Published    1981 
  Keywords    gewidmet Vitamin B12, Methyl Corrinoids, Coa/Co/?-Isomerism, CD Spectra, ORD Spectra 
  Similar Items    Find
 TEI-XML for    default:Reihe_C/36/ZNC-1981-36c-0497.pdf 
 Identifier    ZNC-1981-36c-0497 
 Volume    36