Correlated cell cycle expression of the sulfur metabolic network. (A) Every reaction performed by a predicted enzyme has the gene name and mRNA expression profile flanking the reaction arrow. Dotted arrows indicate that no C. crescentus gene has been predicted to perform this specified reaction. The color of protein names corresponds to the color of the expression profile. Protein and expression profiles in grey indicate that they were not identified as cell cycle-regulated because of the variance between biological replicates. Genes in yellow box are major contributors of the magenta module (see Figure 6B) and are involved in sulfur import and assimilation to cysteine. The expression data used to build the cell cycle profiles are provided in Additional file 3: Table S1b.