Levansucrase ofBacillus subtilis

Abstract
Levansucrase of Bacillus subtilis var. saccharolyticus was purified from the supernatant of an aerobically incubated suspension of the grown cells in a dilute sucrose solution by chromatography on a column of DEAE-cellulose. The synthesis of levan by the purified enzyme resulted in most effectively at low temperatures at around 0°C, and the levan synthesized was isolated by passing the enzyme-reaction mixture through a DEAE-cellulose column followed by ethanol precipitation. The levan was isolated in the pure state ( ] and its molecular weight was determined to be 2x 104 by the gel filtration method.

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