Fig. 10. Chx10 is necessary for proper regulation of CycD1. The percentage of cells
positive for CycD1 is abnormally low in Chx10, Kip1 double null
retinas, just as it is in Chx10 single null retinas. Chx10 is
therefore necessary for proper CycD1 regulation even when proliferation is
significantly restored. **P<0.01.