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  • 1
    ISSN: 1432-1440
    Keywords: Deoxyribonucleases ; diagnosis ; DNA-damage ; microdiscelectrophoresis ; repairmechanism ; urine ; Xeroderma pigmentosum ; Desoxyribonucleasen ; Diagnose ; DNA-Schaden ; Microdiscelektrophorese ; Repairmechanismus ; Urin ; Xeroderma pigmentosum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Das Verteilungsmuster der DNase-Aktivität1 im Urin von Normalpersonen und X.p.-Patienten wurde mit einem mikro-disk-elektrophoretischen Verfahren untersucht. Bei saurer Inkubation sind 4 distinkte Aktivitätsbanden im Normalurin nachweisbar. Urin von X.p.-Patienten zeigt eine deutliche Verminderung der 2.–4. Bande, wobei die Veränderung der 3. Bande besonders auffällig ist. Es wurde ferner untersucht, wie sich das Verhalten verändert, wenn statt nativer DNA denaturierte als Substrat angeboten und wenn die zweiwertigen Ionen durch EDTA komplexiert wurden. Eine Aktivitätsverminderung ist nicht auf das Auftreten von Inhibitoren zurückzuführen, sondern wahrscheinlich durch eine Konzentrationsverminderung an Enzym verursacht.
    Notes: Summary The distribution pattern of desoxyribonuclease (DNase) activity1 in the urine of healthy subjects and xeroderma pigmentosum (X.p.) patients has been examined by micro disc electrophoresis. When incubated at pH 5.0, four distinct bands of DNase activity are shown in normal urine. In urine of X.p. patients a significant decrease of the second to fourth band can be observed. The change of the third band is extremely obvious. Further to the influence of native DNA, denaturated DNA and EDTA on the pattern of DNase activities were studied. The decrease of DNase activity in X. p. urine is not due to the presence of an inhibitor but is rather caused by lower enzyme concentrations.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Archives of dermatological research 275 (1983), S. 213-217 
    ISSN: 1432-069X
    Keywords: Acid ; Neutral DNases ; Epidermis ; Microdisc ; Electrophoresis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Acid and neutral deoxyribonucleases (DNases) of the cow snout epidermis were investigated by the microdiscelectrophoresis of polyacrylamide gels containing highly polymerized DNA and by isoelectric focusing techniques. The nucleases were characterized with respect to their pH optimum. An acid DNase at pH 5.0 was detected as a single distinct band after the electrophoretic separation. After isoelectric focussing also, only one acid DNase activity with an isoelectric point (IP) of 6.2 was detectable. Neutral DNases at pH 7.4 were demonstrated as major and minor bands by their different electrophoretic mobilities. In the isoelectric focusing system also, two neutral DNases, a major one (IP, 4.6) and a minor one (IP, 6.4), were found. Characterization with respect to their histologic location showed acid and neutral DNases across the epidermal layers with the highest activities in the upper layers, where DNA concentration had been shown to be lowest. In correlation with their subcellular distribution, the highest activities of both acid and neutral DNase were found in the 105,00xg supernatant of the subcellular fractions.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 330 (1988), S. 476-478 
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 63 (1951), S. 280-281 
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die [H+]-Aktivität des salzsäure-haltigen Aminosäure-Eluats hängt von der vorhandenen Aminosäure-Menge ab. Ihre Messung ermöglicht es also, ohne chemische Reaktionen zu bestimmen, wann eine Aminosäuren-Zone herausgewaschen wird.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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