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Fig. 1. (A) Comparison of flu gene transcription levels in E.coli strains MG1655(pfimB) and MG1655Δfim(pfimB) (a derivative in which the fim genes have been deleted). Quantification of mRNA levels was performed by direct scanning of DNA chips. (B) Phase contrast and immunofluorescence microscopy of E.coli strains MG1655(pfimB) and MG1655Δfim(pfimB) employing anti-Fim and anti-Ag43 serum, respectively.
