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Comparable fra expression patterns are detected in lateral views of the developing nervous systems (arrows) of An. gambiae (33 hrs., A) and Ae. aegypti (52 hrs., B). Ventral views of Aae fra expression in 52 hr. (C, segments T3–A5) and 54 hr. (D; segments A2–A6) Ae. aegypti embryos are shown. Anterior is oriented left in A and B and up in C and D.
