An OmicsViewer representation of the metabolic pathways in MouseCyc. Reactions catalyzed by enzymes with targeted (knockout) mutation or gene trap alleles in the corresponding genes are shown in color: red depicts existence of both knockout and gene trap alleles; blue indicates knockout alleles; green indicates gene trap alleles. The graphic was generated by processing the Phenotypic Allele report from the MGI FTP site. The data of interest were converted to a two column tab-delimited file with current MGI symbols for genes in the first column and a numeric value in the second column. The numeric value indicated if a gene had a targeted allele, gene trapped allele, or both. Each value corresponded to a specific color among the range of colors supported by the OmicsViewer. The data used to generate this figure are available at .