PCR products were purified by agarose gel
electrophoresis and extracted using a Qiagen Gel extraction Kit.
Sequencing was done by QIAGEN using the pTnMOD-specific
primer. The raw sequences were analysed by blastn search against
the sequences of the predicted genes as well as the complete genome
sequence of P. aeruginosa PAO1 [41] or PA14 [42].