show Abstracthide AbstractIn embryos, DCC binding across the length of the ~17.7 Mb X chromosome initiates at a set of recruitment elements on the X (rex). Individual rex sites collectively contribute to recruitment and repression, thus deletion of one or few rex sites causes subtle changes, as measured by mRNA-seq in mixed-stage embryos. We previously constructed a strain deleting rex-1, located ~6 kb downstream of dpy-23 (https://doi.org/10.7554/eLife.23645). Here we performed mRNA-seq in rex-1 deletion embryos. Overall design: mRNA-seq in controls and rex-1 deletion embryos.