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Fig. 8. Reduction of RPTP{psi} function affects convergent extension. RPTPmo embryos show shortening and broadening of the body axis (yellow arrows in B,E), a characteristic of convergent extension mutants. This effect is confirmed by using markers for the nascent notochord (A,D; ntl, arrowheads), the boundaries of the neuroectoderm (B,E; dlx3), the anteriormost prechordal plate hgg1 (hatching gland gene 1; B,E) and somites (C,F; deltaC). (A-C) Wild-type control embryos, (D-F) RPTPmo embryos. (G) Cycling deltaC expression in the psm of wild-type and knypek (kny) mutant embryos.