Abstract
1. 1. β-Galactosidase (β--galactoside galactohydrolase, EC 3.2.1.23) was isolated from Bacillus subtilis and partially purified.
2. 2. When the measurements were made at saturating or nearly saturating concentrations of substrate there was a linear relationship between the quantity of enzyme and the amount of product formed, and a linear formation of
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