Fig. 3. Schematic comparison of Endo16 transcription in S. purpuratus and L. variegatus. The pattern of Endo16 expression (shown in blue) is relatively conserved between S. purpuratus (A) and L. variegatus (B). (Asterisks indicate prospective foregut.) However, Endo16 expression is downregulated in the posterior third of the archenteron (prospective hindgut) only in S. purpuratus. (Arrows indicate hindgut.) SpEndo16 expression persists in the midgut, while LvEndo16 expression persists in both the midgut and hindgut of the pluteus larva.

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