Fig. 4From: Host range of strand-biased circularizing integrative elements: a new class of mobile DNA elements nesting in GammaproteobacteriaPCR detection of SE-6283 attS in single-gene knockout strains. a BHY606. b intA-knockout strain BID1. c intB-knockout strain BID2. d CDS4-knockout strain BID3. Primer numbers correspond to the numbers in Fig. 2a. PCR products were electrophoresed in 2.0% agarose gel. The ladder used was 50 bp DNA Ladder from New England BiolabsBack to article page