Abstract
Precipitation and purification of amylase secreted byStreptomyces aureofaciens 77 in liquid inorganic salts-starch medium under the optimum conditions were carried out. Ammonium sulphate fractionation was used to precipitate amylase in cell free culture filtrate. (NH4)2SO4 at a concentration of 50–70% saturation gave the highest enzyme yield. The obtained precipitates were redissolved in phosphate buffer (pH 7.0) and subjected to dialysis. The dialyzed enzyme preparation was applied to DEAE-cellulose column chromatography which resulted in an increase of purification up to 59.48 fold. A further step of purification was done by applying the obtained puified sample to Sephadex-G200 column chromatography which resulted in an increase of purification up to 73.92 fold. The results clearly indicated that the isolated amylase from S.aureofaciens 77 was only on type.
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Ibrahim, A.N., Ahmed, F.H., Ibrahim, M.M.K. et al. Precepitation and purification of amylase enzyme produced byStreptomyces aureofaciens 77 . Arch. Pharm. Res. 13, 28–32 (1990). https://doi.org/10.1007/BF02857830
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DOI: https://doi.org/10.1007/BF02857830