Characterization of a new cell-bound alpha-amylase in Bacillus subtilis 168 Marburg that is only immunologically related to the exocellular alpha-amylase

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Abstract
Immunoblot analysis of Bacillus subtilis cell extracts with polyclonal antibodies, raised against purified exocellular alpha-amylase, revealed one protein species of 82,000 Da. This protein was found even in cells in which the amyE gene, encoding exocellular alpha-amylase, was disrupted. Isolated from the membrane fraction, the 82,000-M(r) protein displayed an alpha-amylase activity in vitro.