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Fig. 11. Effects of Xdd1 on archenteron inflation. (A) Archenteron volume is reduced significantly in both dorsally and circumferentially injected embryos (***P<0.001, n=38 control, 50 dorsal, 24 circumferential). In contrast to archenteron length, archenteron volume is significantly reduced in circumferentially injected embryos compared with in dorsally injected embryos (**P<0.01). (B) A plot of archenteron inflation against archenteron elongation shows no obvious correlation between the two processes (each point represents a single embryo).