FIG. 1.

Northern blotting of ORFs up- or downregulated from microarrays of CHE482 against CHE482ΔxdrA. (A) Locus maps of selected ORFs either upregulated (gray) or downregulated (black) in CHE482ΔxdrA. The designations of ORFs used as probes for Northern blotting are shown in boldface. (B) Northern blots of RNA extracted from strains CHE482 and ZH44: WT, wild type; Δ, ΔxdrA deletion mutant; C, mutant complemented with xdrA in trans. ORFs/genes used as probes are given on the right. Ethidium bromide-stained 16S rRNA bands are shown beneath the transcripts as an indication of RNA loading.