Analysis of the interaction between deltaC and the after eight/deltaD (aei/dld), beamter (bea), and deadly seven/notch1a (des/n1a) mutations in the Delta/Notch signaling pathway. Myotome boundaries in the trunk are shown in 26 hpf embryos in lateral view with anterior to the left and dorsal upwards (A–C, E–G, I–K). (A) aei/dld uninjected, (B) wild type injected with 1 ng/nL dlcMO3 and 1 ng/nL dlcMO4, (C) aei/dld injected with dlcMOs. (E) bea uninjected, (F) bea injected with 1 ng/nL dlcMO3 and 2 ng/nL dlcMO4, (G) bea injected with 3 ng/nL her7MO1 and 3 ng/nL her7MO2. (I) des/n1a uninjected, (J) wild type injected with 0.5 ng/nL dlcMO3 and 0.5 ng/nL dlcMO4. (D, H, L) Histograms comparing Anterior Limit of Defects (ALD) for these nine conditions. Arrows in panel (A–C), (E–G), and (I–K) indicate ALD in each embryo.