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  • Title: A highly thermostable and alkaline amylase from a Bacillus sp. PN5.
    Author: Saxena RK, Dutt K, Agarwal L, Nayyar P.
    Journal: Bioresour Technol; 2007 Jan; 98(2):260-5. PubMed ID: 16524725.
    Abstract:
    A highly thermostable alkaline amylase producing Bacillus sp. PN5 was isolated from soil, which yielded 65.23 U mL(-1) of amylase in medium containing (%) 0.6 starch, 0.5 peptone and 0.3 yeast extract at 60 degrees C, pH 7.0 after 60 h of incubation. Maximum amylase activity was at pH 10.0 and 90 degrees C. The enzyme retained 80% activity after 1 h at pH 10.0. It exhibited 65% activity at 105 degrees C and had 100% stability in the temperature range between 80 and 100 degrees C for 1 h. In addition, there was 86.36% stability after 1-h incubation with sodium dodecylsulphate. These properties indicated possible use of this amylase in starch saccharification and detergent formulation.
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