Fig. 1. Expression of PVR was detected by antibodies directed against the C-terminal region of the protein, and appeared to follow cell outlines. (A-C) From embryonic stage 14 onwards, prominent expression was detected throughout the embryonic ectoderm. PVR is also expressed in hemocytes (arrowheads) and midline glial cells (arrow). In B, muscles are stained with anti-myosin (green). (D) In the third instar larval eye disc, general cell-membrane association of PVR is observed. (E,F) In the third instar larval wing disc, the receptor is similarly expressed. F is an optical cross-section, showing the uniform distribution of PVR along the apicobasal axis. In all cross-sections, apical is shown towards the top. (G) Expression of PVR persists in the pupal wing.