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Detection of family 19 chitinase genes by Southern hybridization. Chromosomal DNAs were digested with either PstI (left lane of each pair) or SalI (right lane of each pair). The numbers are the strain numbers in Table 1. (A) S. griseus HUT6037; (B) ApaI-BamHI-digested fragment of the chiC gene in plasmid pGC01A; (C) B. circulans WL-12; (D) S. marcescens 2170.
