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The chiS and chiR genes located upstream of the chitinase locus (chi40) on the chromosome of Streptomyces thermoviolaceus OPC-520 were cloned and sequenced. The deduced amino acid sequences revealed that ChiS (390 amino acids, 40.9 kDa) and ChiR (213 amino acids, 22 kDa) show significant sequence similarities to histidine kinases and response regulators, respectively, of typical prokaryotic two-component...
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