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Fig. 6. Progression through endocytosis promotes EGFR signaling.
(A,B) An HrsD28/Df(2L)Exel6277 Drosophila
eye disc stained with anti-Elav (A, green in B) and anti-Sens (magenta in B).
The arrow in B indicates a group of ommatidia containing only R8
photoreceptors. (C,D) aos-lacZ expression in wild-type
(C) and HrsD28/Df(2L)Exel6277 (D) wing discs stained in
parallel with X-Gal. R1-7 differentiation and aos expression are
reduced in Hrs mutants. (E) Semi-quantitative RT-PCR for
Actin, mop, Tsg101 and Vps28 mRNA in D2F cells treated with
mop, Tsg101 or Vps28 dsRNA, demonstrating efficient
knockdown in each case. (F) Western blot with antibodies to Tubulin and
diphospho-MAPK of lysates from D2F cells treated with lacZ, mop,
Tsg101 or Vps28 dsRNA and incubated with Spi for 0 or 30
minutes. Depletion of either Mop or the ESCRT-I complex components reduced
MAPK phosphorylation.