Fig. 7. Phenotypes of bnk and scraps are co-expressed. Projections of confocal sections of the cellularization front (A-C) and sagittal sections (D-F) of the same bnk mutant (A,D), scraps^RS/scraps^PQ mutant (B,E) and scraps^RS/scraps^PQ; bnk double-mutant (C,F) embryos. Embryos were stained with antibody to myosin (A-F) and with Hoechst dye (D-F). (A) Microfilament rings are hypercontracted in bnk mutant embryos; some nuclei are constricted into dumbbell shapes by the hyperconstricted microfilament rings and carried out of the periphery by the cellularization front in bnk embryos (D). (B) scraps mutant embryos showing the absence of microfilament rings, angular basal lumens and a normal nuclear morphology (E). (C) Microfilament rings are not formed in scraps; bnk mutant embryos, but the cellularization front still exhibits increased contraction and large gaps in the microfilament network. (F) Despite the absence of microfilament rings in scraps; bnk mutant embryos, some nuclei are constricted into dumbbell shapes by the contracted microfilaments and carried out of the periphery. Scale bar: 10 µm.