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Expression of pilA genes in E. corrodens VA1-S1 and VA1-L2. Samples of total RNA (5 μg per lane) from strain VA1-S1 (lanes 1) or VA1-L2 (lanes 2) were subjected to blot hybridization against RNA probes specific for transcripts from pilA1 (A) or pilA2 (B). The positions of RNA molecular size standards are shown at the left.
