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Fig. 5
Comparison of shh Expression in ntl Mutant Embryos and Wild-Type Embryos at the Tail Bud Stage
Rostral is to the top. The expression of pax-2 in the Wolffian duct (asterisk) serves as a positional marker. Note the slightly uneven distribution of shh-expressing cells in the notochord precursor cells (arrowheads) of the ntl embryo (see also Halpern et al., 1993) (B) compared with the even rod-like distribution in wild-type embryos (A).
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Reprinted from Cell, 75(7), Krauss, S., Concordet, J.P., and Ingham, P.W., A functionally conserved homolog of the Drosophila segment polarity gene hh is expressed in tissues with polarizing activity in zebrafish embryos, 1431-1444, Copyright (1993) with permission from Elsevier. Full text @ Cell