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Gel electrophoresis. DNA molecular market: GeneRuler-100bp-Plus. Lines show negative controls (Control) and B. subtilis strains (2S, 5Cm, 5Cs, 6Ss, 6Sm). (a) PCR products of the internal fragment of the ‘Bacillus subtilis group’ of 16S-rRNA gene using the species-specific primers Bsub5F-Bsub3R (600 bp). (b) PCR products of srfAA gene (surfactin) (700 bp). (c) PCR products of bacA gene (bacylisin) (approx. 500 bp). (d) PCR products of bmyB gene (bacillomycin) (approx. 300 bp).
