Fig. 2. Expression pattern of germ layer specific markers in Oct25 mRNA injected embryos. Shown are the mesodermal marker Xbra (vegetal view), mesodermal expression of XSna (vegetal view), the paraxial mesodermal marker PAPC (dorso-vegetal view), the endoder- mal marker Xsox17a (vegetal view), and the early dorsal and neural marker Sox3 (dorsal view). (A-E) Expression of these markers in uninjected embryos at midgastrula stages 11-11.5. (F-J) Corresponding expression in embryos injected with Oct25 mRNA in the animal pole. (K-O) Corresponding expression in embryos after injection of Oct25 mRNA in the marginal zone. Appendant values are listed in Table S2.