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Fig. 5. E(spl)-C locus regulates Twist modulation into low and high
domains. (A-D) Lateral views of stage 10 embryos stained with anti-Twist:
(A,C) whole-mount embryo, (B,D) corresponding close-ups of embryos in (A,C).
(A,B) Df E(spl)-C mutant maintains high Twist expression uniformly
throughout its mesoderm, similar to Nnull embryos. (C,D)
Df E(spl)-C, P[gro+] mutant has expanded high Twist
domains compared with wild type. Black arrowhead indicates cells, located in a
presumptive low Twist domain, expressing higher levels of Twist than wild
type.