Pulsed field gel electrophoresis of DNA from B. thuringiensis AWO6. Panel A, Ethidium bromide-stained agarose gel. Lane 1 is the PFGE DNA size marker. Lane 2 is B. thuringiensis AWO6 DNA. Lane 3 is a Southern blot of pXO2-derived probes hybridizing to a DNA band the size of the pAW63 plasmid. Panel B, size of pAW63 plasmid and hybridizing DNA determined using PFGE.