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Rbmx is required for normal muscle formation and segmentation. Embryos shown are injected with Rbmx MO in one cell at the 2-cell stage and cultured to stage 38. (A,B) in situ hybridazation for MyoD. (C,D) 12–101 antibody staining for skeletal muscle. (E,F) outline of muscle segmentation pattern shown in (C,D). Hypaxial muscle migrated from the axial muscle block in (E, colored solid) is absent on the injected side (F).
