Co-expression analysis of a P450 associated with plastidial activity: CYP97A3. Microarray expression data were retrieved from the 'Genevestigator' database and processed as described in Methods. The organ expression vector of CYP97A3 was used as bait for co-expression analysis as described in Figure 4. The expression vector of the bait CYP97A3 (first row) is shown across 167 organ and tissue samples. 50 co-expressed genes having a correlation coefficient of r > 0.84 are shown in subsequent rows. The resulting heatmap is color coded as indicated. Highlighted in green are genes from the categories 'plastidial isoprenoids' (BioPath), 'photosystems' (BioPath), 'photosynthesis' (KEGG or FunCat), and 'biogenesis of the chloroplast' (FunCat). Detailed information on the co-expressed genes and samples can be found in Additional File 6. Up to 80 additional P450s in the CYPedia analysis share a similar expression profile and pathway prediction.