Fig. 2. Early ectopic expression of Ttk69 inhibits neural development. (A) UAS-Ttk69 was expressed ectopically in parasegments T2 to A4 (between arrowheads) under the control of Kr-Gal4. Ectopic expression levels were comparable with endogenous expression in the cephalic region (asterisk). Ectopic Ttk69 does not prevent the early neuroblast expression of Achaete (B), but does inhibit Asense expression (C) and the mature neural marker Elav (D). (E) Expression of a dpn-lacZ reporter (in green) is inhibited by ectopic expression of Ttk69 using sca-Gal4 (F, Ttk69 revealed in red).