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  • Electronic Resource  (2)
  • 1980-1984  (2)
  • 1982  (2)
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  • Electronic Resource  (2)
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  • 1980-1984  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Enzyme inactivation and inhibition by Gossypol (1982)
    Springer
    Molecular and cellular biochemistry 47 (1982), S. 65-70 
    Details
    ISSN: 1573-4919
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Summary Three lactate dehydrogenase isozymes and malate dehydrogenase purified from mouse tissues were inactivated with time by low concentration of gossypol. The degree of enzyme inactivation is both gossypoland enzyme-concentration-dependent. Under the same experimental conditions, lactate dehydrogenase-X and lactate dehydrogenase-5 were inactivated faster than lactate dehydrogenase-1. NADH was shown to partially protect the enzymes against inactivation by gossypol. The results of this study suggest that the enzymes are inactivated by the minor components in gossypol preparations. Isozymes of glutathione S-transferases were reversibly inhibited by gossypol. The inhibition of transferases by gossypol was shown to be competitive with respect to the 1-chloro-2,4-dinitrobenzene. It is proposed that the male antifertility effect of gossypol may be related to the selective inactivation of sperm-specific lactate dehydrogenase-X.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00234406
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Potentiometric quantitation of glycerol using immobilized glycerol dehydrogenase (1982)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 24 (1982), S. 971-975 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Glycerol dehydrogenase was immobilized in polyacrylamide gel layered over a small platinum screen and used to catalyze the oxidation of glycerol. In the presence of NAD+ and potassium ferricyanide, the coupling reaction generated a measurable electrical potential which was found to be Nernstian with respect to the glycerol concentration range of 10-4M to 10-1M. The reproducibility of the measurement and the optimal conditions for glycerol determination were described.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260240416
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    Paper (German National Licenses)
    Fulltext
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