Evidence for two β-galactosidase activities inStreptomyces violaceus

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… CONTINUE READING