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Inverted repeats of pXLNRir. PCR-amplified portion of inverted repeat of pXLNRir from genomic DNA of non-silenced and silenced strains. Triangle Expected fragment for intact inverted repeat region. M Molecular weight marker; P silencing plasmid pXLNRir; C wild-type strain (NW219::pGW635); numerals designate each non-silenced and silenced strain (NW219::pGW635::pXLNRir)
