Fig. 9. Expanded domain of expression of primitive streak markers in Nap1^khlo mutants. (A-C) Posterior views of T expression in E7.5 wild-type (A) and Nap1^khlo embryos (B,C). These Nap1^khlo mutants expressed T ectopically at the embryonic-extraembryonic boundary (B) or in two distinct primitive streaks (C). (D,E) Wnt3 is expressed in the posterior of E6.5 wild-type embryos (D), but is expressed around the circumference of Nap1^khlo mutants (E) at E6.5. Anterior is to the left in D and E.