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'Catechols' in keywords
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1979 (2)
1Author    DennisG. Brown, WilliamJ. HughesRequires cookie*
 Title    Copper(II) Complexes Containing 3-n-Nonylcatechol: Preparation and Ligand Oxidation  
 Abstract    Ternary copper(II) complexes containing the dianion of 3-n-nonylcatechol and a number of bidentate nitrogen containing counter ligands have been prepared and charac-terized. It has been demonstrated that, in the presence of oxygen, the catecholato ligand undergoes intradiol ring cleavage in a fashion similar to that carried out by intradiol aromatic dioxygenases. The 3-n-nonylcatecholato ligand was chosen as an analog for the naturally occuring 3-pentadecylcatechols or "urushiols" which are the active allergens in plants such as poison ivy. 
  Reference    Z. Naturforsch. 34b, 1408—1412 (1979); received June 19 1979 
  Published    1979 
  Keywords    Copper, Dioxygenase, Urushiol Model, Catechol 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-1408.pdf 
 Identifier    ZNB-1979-34b-1408 
 Volume    34 
2Author    Joseph Veser, P. Eter, G.Requires cookie*
 Title    Purification and Properties of a Catechol Methyltransferase of the Yeast Candida tropicalis  
 Abstract    In an effort to investigate catechol methyltransferase activity in sources other than mam m alian tissues and cells, a high level o f enzyme activity was found in the yeast fungus Candida tropicalis CBS 94. Partial purification o f the enzyme (approx. 550 fold with a recovery o f 7%) could be achieved by using ion-exchange and gel filtration techniques. The molecular w eight was estimated at 32,000 ± 2,000 by gel filtration on Sephadex G-100. In isoelectric focusing experiments on Sephadex G-75 the enzym e exhibited a pl-value o f 5.0 ± 0.1. In contrast to catechol methyltransfer­ ase from various m am m alian tissues the enzyme activity was prepared from the pH 5-sediment. The substrate specifity is com parable to other catechol methyltransferases. 
  Reference    Z. Naturforsch. 34c, 709 (1979); received April 24 1979 
  Published    1979 
  Keywords    Catechol Methyltransferase, Yeast Fungus, Candida tropicalis CBS 94, Enzyme Purification, Catechols 
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 TEI-XML for    default:Reihe_C/34/ZNC-1979-34c-0709.pdf 
 Identifier    ZNC-1979-34c-0709 
 Volume    34