Fig. 8. src64 activity is required for bnk hypercontraction. Projections of confocal sections of the cellularization front (A-C) after it has passed the nuclear bases of a bnk mutant (A), a src64 mutant (B) and a src64 bnk double-mutant (C) embryo. Embryos were stained with antibody to myosin (A-C). (A) bnk mutant embryo showing hypercontracted microfilament ring phenotype. (B) src64 mutant embryo showing non-contracted microfilament ring phenotype. (C) src64 bnk double-mutant embryo showing a non-contracted microfilament ring phenotype similar to that of src64 mutant embryos (B). Scale bar: 10 µm.