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Evidence for two β-galactosidase activities inStreptomyces violaceus

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Abstract

The kinetics of β-galactosidase synthesis induced by galactose and lactose inStreptomyces violaceus, as well as the pattern ofo-nitrophenyl-β-d-galactoside-positive bands observed after electrophoresis of both crude extracts, showed the presence of different β-galactosidase activities in the two cellular extracts. It is postulated that the lactase activity induced by lactose is the physiological enzyme responsible for lactose utilization. The possible function of the galactose-induced activity is also discussed.

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Authors and Affiliations

  1. Eidgenössische Technische Hochschule, Mikrobiologisches Institut, CH-8006, Zürich, Switzerland

    Jesús Sánchez

  2. Departmento de Microbiologia, Universidad de Oviedo, Oviedo, Spain

    Carlos Hardisson

Authors
  1. Jesús Sánchez
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  2. Carlos Hardisson
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Sánchez, J., Hardisson, C. Evidence for two β-galactosidase activities inStreptomyces violaceus . Current Microbiology 4, 91–94 (1980). https://doi.org/10.1007/BF02602899

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