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FAN Yu-Yi, HU Zheng-Yu, Mei Hong. Tyrosinase Inhibitory Activities of Methanolic Extracts from Different Nostoc Species[J]. Plant Science Journal, 2008, 26(2): 179-182.
Citation: FAN Yu-Yi, HU Zheng-Yu, Mei Hong. Tyrosinase Inhibitory Activities of Methanolic Extracts from Different Nostoc Species[J]. Plant Science Journal, 2008, 26(2): 179-182.
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Tyrosinase Inhibitory Activities of Methanolic Extracts from Different Nostoc Species

  • 1.

    Institute of Hydrobiology, The Chinese Academy of Sciences, Wuhan 430072, China

  • 2.

    Graduate School of Chinese Academy of Sciences, Beijing 100039, China

  • 3.

    Wuhan Botanical Garden, The Chinese Academy of Sciences, Wuhan 430074, China

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  • Received Date: August 02, 2007
  • Revised Date: November 27, 2007
  • Published Date: April 29, 2008
    Graphical Abstract
    • Abstract
  • The inhibitory effects on tyrosinase of the methanolic extracts from 10 Nostoc strains were investigated.The results show that the inhibitory action for the above 6 strains of Nostoc enhanced with the increase of concentration of the methanolic extracts.The methanolic extracts of Nostoc sp.FACHB892 has great inhibitory capacity on tyrosinase,of which the inhibitory rate is 60.54% at concentration of 33.3 μg/mL,while the methanolic extracts of other 5 strains(Nostoc sp.FACHB95,Nostoc sp.FACHB106,N.punctiforme FACHB252,N.calcicola FACHB389 and N.parmiloides FACHB392) exhibitted weaker inhibitory effects.The inhibitory rates are 41.55%,37.58%,46.94%,52.12% and 47.95% respectively at the same concentration.The inhibitory mechanism of the methanolic extracts of Nostoc sp.FACHB892 on tyrosinase is reversible and noncompetitive indicated by the enzymatic kinetic analysis.
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