Inhibotory activity of pyridindolol on β-galactosidase

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  • Inhibitory activity of pyridindolol on .BETA.-galactosidase.
  • Inhibotory activity of pyridindolol on

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The activity of pyridindolol in inhibiting β-galactosidases obtained from various sources has been studied. Whereas acid bovine liver β-galactosidase (optimal pH 4.0) was not affected by this compound, neutral bovine liver β-galactosidase (pH-optimum=7.0) was inhibited by pyridindolol in reaction mixtures of pH 4.05.0. There was no inhibition at pH 7.0. The type of inhibition is non-competitive by formation of a pyridindolol-enzyme complex. Since β-galactosidases from other sources are not affected by pyridindolol, the inhibitory action of this compound seems to be rather specific for neutral bovine liver β-galactosidase.

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