Reca-negative and rhab-negative microorganism

摘要

The present invention describes new microorganisms specifically for use as expression systems for rhamnose-in-ducible promoters. Due to the combination of rhamnose and recombination deficiency artificially created in these organisms, ex-pression systems which require less of the expensive rhamnose for induction and therefore can be induced more inexpensively, and have a higher genetic stability are obtained.