Actin reporters and their association with late endosomes. (A and B) Terminal cells expressing CD4::mIFP (A' and B'') under btl-gal4 and MoeRFP under direct control of the btl promoter (A'' and B'''); ventral is down. (A) Control. (B) Cell also expressing Shrb::GFP under btl-gal4 (B'). Arrowheads point to CD4 and MoeRFP puncta. (C–E) Larval terminal cells stained with phalloidin. (C) Control larva expressing endogenously labeled Rab7::YFP. (D) Cell expressing Rab7^Q67L::YFP. (E) Cell expressing Rab7^T22N::YFP. Regions marked in C–E are shown in C’–E’ but as single z-slices instead of projections. (C'') Endogenously labeled Rab7::YFP. (D'') Rab7^Q67L::YFP. (E'') Rab7^T22N::YFP. (C'''–E''') Phalloidin.