FIG. 4.
Plots of relative hybridization intensities (IR) for macroarray hybridizations of wild-type and hyd mutant D. vulgaris strains. The upper and lower lines represent a fourfold change in gene expression from the central line. (A) Comparison of RNA extracted from two separate cultures of the wild type in WP-LS medium. The data are means of two array hybridizations. (B) Comparison of gene expression for the wild type and hyd mutant grown in WP-LS. The data are means of four array hybridizations. Genes outside the fourfold expression corridor are as follows: 1, ORF2977 adh; 2, ORF2976 putative H2:Hdr reductase complex subunit gene; 3, ORF2967 putative H2:Hdr complex subunit gene; 4, ORF2128-2130 NiFe hydrogenase genes; and 5, ORF3201 hybrid cluster protein gene.