After much effort, I have pieced together 71 cytochrome P450 protein sequences starting from C. elegans genomic sequences. Some have been in the GenBank database for some time. Many others are unfinished cosmid sequences in the ftp repositories at the Sanger Center and the Wash U. Genome Sequencing Center. These later sequences were downloaded and translated in three frames to identify where the beginning and ends of the sequence lie. The region was fed through the Baylor College of Medicing GeneFinder website set for nematode sequences. If this successfully assembled the gene, I stopped there. If not, then I did it the hard way by inspection of the three translated frames to find the most probable protein sequence. These sequences may not have the correct intron exon structures, but they should be pretty close. I should mention that the Gene Finder program was not very successful in constructing P450 genes. I had to do most of them by myself. To see a list click here. I will try to post the actual sequences soon if I get permission from the sequencers. THIS REPRESENTS THE LARGEST COLLECTION OF P450S FROM A SINGLE ORGANISM. The genome of C. elegans is about 67% complete, so there might be as many as 100 P450 genes in C. elegans, though there are a lot on chromosome V for some reason. This may skew the results, so there might be much less than 100. The odd distribution is noticeable on CHR I also. There is only one P450 on CHR I so far.