This is a a 4,593 base region of exact match to E. coli on C. elegans chromosome X. The edges match the IS10 insertion sequence of the transposon Tn10. Genomic short-read sequences do not match to this region. It is likely that a transposon insertion event ocurred while the clone was being grown and prepared for sequencing. It is less likely that a horizontal gene transfer has occured into living C. elegans organisms at some time in the past.