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Nucleotide sequence of the beta-lactamase gene of alkalophilic Bacillus sp. strain 170.

A gene for the beta-lactamase from alkalophilic Bacillus sp. strain 170 was cloned in a functional state on a 1.0 kb DNA fragment and its nucleotide sequence was determined. The coding sequence showed an open reading frame of 257 amino acids, which represents the beta-lactamase precursor protein. It is considered that the signal peptide consisted of 30 amino acids including 12 hydrophobic amino acids.