| | 1 | Author
| DennisG. Brown, WilliamJ. Hughes | Requires 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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| default:Reihe_B/34/ZNB-1979-34b-1408.pdf | | | | Identifier
| ZNB-1979-34b-1408 | | | | Volume
| 34 | |
| 2 | Author
| 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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| default:Reihe_C/34/ZNC-1979-34c-0709.pdf | | | | Identifier
| ZNC-1979-34c-0709 | | | | Volume
| 34 | |
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