Fig. 8

Fig. 8 Late marker gene expression during pharyngula stages in noi mutant embryos. Shown are lateral views, anterior to the left (except F-H: dorsal views). (A,B) no eng3 is seen in null mutants at 22 hours, whereas in the strong allele noi^th44a (C) a ventral eng3-positive spot can still be detected, and both ventral and dorsal expression is visible in weak noi^tb21 mutants (D,E); E, transverse section. (F-H) 24 hours. eng2 expression in the neural tube is absent in noi^tu29a; lateral expression in presumptive eye muscles is not affected. In the weak noi^ty31a allele ventral expression is seen, and is located, similar to the eng3 expression, in the ventral neural tube (I; transverse section). (J-M) Eng1 and her5 expression is completely absent at 26 hours.