The following information was provided by John Roote, University of Cambridge.
P{RS5}5-SZ-3078 (FBti0073435) and P{RS5}5-HA-1994 (FBti0073408) are inserted in the X portion of Dp(1;Y)y+ rather than a normal X chromosome. The males where transposition occurred in the P{RS5} mobilization screen described in Ryder et al. (/reports/FBrf0179424.html) usually carried Dp(1;Y)y+ rather than a normal Y chromosome.