The roX genes of Drosophila produce a transcript that is spliced and polyadenylated but not translated. Recent work has shown that these genes provide an element that the dosage compensation complex of Drosophila uses to initiate its association with the X chromosome.
Lucchesi, J. C. (2002). Dosage compensation: roX marks the spot. Current Biology, 9(21), R807–R808. https://doi.org/10.1016/s0960-9822(99)80495-3