Expression of prosScer\UAS.cUa under the control of Scer\GAL4htl.POS glia results in a reduction in mitosis in the longitudinal glia (LG) and a final LG number of six per hemisegment (instead of the normal 10-12). Stage 16 LG expressing prosScer\UAS.cUa under the control of Scer\GAL4htl.POS are rounded (in contrast to wild-type LG, which have spread out by this stage).