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Figure 7: The GMR-R phenotype is suppressed by Drosophila Rb and p21 and enhanced by E2F. Crosses were performed between GMR-R3 and GMR-Rbf, GMR-E2F, and GMR-dacapo. SEMs, at 500x and 2000x, are shown for GMR-R3/+ (a, b), GMR-Rbf/+ (c, d), GMR-R3/GMR-Rbf (e, f), GMR-E2F/+ (g, h), GMR-R3/GMR-E2F (i, j), GMR-dacapo/+ (k, l), and GMR-R3/GMR-dacapo (m, n).