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Mahjong acts as a downstream target of Lgl in cell competition and basal cell extrusion.

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posted on 13.07.2010, 00:23 by Yoichiro Tamori, Carl Uli Bialucha, Ai-Guo Tian, Mihoko Kajita, Yi-Chun Huang, Mark Norman, Nicholas Harrison, John Poulton, Kenzo Ivanovitch, Lena Disch, Tao Liu, Wu-Min Deng, Yasuyuki Fujita

The mosaic analysis with a repressible cell marker (MARCM) system was used to overexpress UAS constructs in either mahj−/− clones (A) or lgl−/− clones (B, D, and E). Homozygous mutant clones are marked by the expression of GFP. (A) mahj−/− MARCM clones overexpressing Lgl at 96 h after clone induction. (B, D, and E) lgl−/− MARCM clones overexpressing Mahj at 144 h (B and D) or 96 h (E) after clone induction. (C) Quantification of apoptotic cells in the lgl−/− mosaic wing discs with or without overexpression of Mahj. The percentage of apoptosis occurring in lgl−/− cells on the boundary with wild-type cells was examined. The results represent means±SD (n = 13 discs, *p<0.001). (D) A transverse section. Anti-cleaved Caspase-3 (A and B), anti-DE-Cadherin (D), and anti-phospho JNK (E) antibodies were used for immunostaining. (A, B, D, and E) Nuclei were stained with DAPI (blue).

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