Fig. 8. The spl mutation affects R8 independent of Fringe. Clones of fng homozygous mutant cells were identified by a lack of ß-galactosidase expression (magenta; A,A'',B,B''). R8 cells were labeled for Senseless protein (green; A,A',B,B'). (A) Senseless expression was largely normal in the absence of fng. (B) The spl mutation reduced the number of R8 cells in fng mutant cells and in neighboring territories. As was typical in the spl mutant, the level of Senseless expression varied in cells that were also mutant for fng (arrows).