Fig. 3. Hox genes spatially regulate NB quiescence. Drosophila embryos were labeled for markers indicated at the top. (A-H) NB3-3T (A,C,E; stage 16) and thoracic EL neurons (B,D,F; stage 17) of wild-type (A,B), Antp (C,D) and wor>abd-A (E,F) and NB3-3A (G, stage 15), and abdominal EL neurons (H, stage 17) of wild type. White arrowhead, NB3-3; yellow arrowhead, DmLin29-positive EL neuron. (I) Schematics of DmLin29 expression in EL neurons. The seventh to 11th late-born abdominal EL neurons are DmLin29 positive, although the expression in seventh- and 11th-born EL neurons is hard to detect at stage 17 owing to the decay and late expression of DmLin29. (J,K) BrdU incorporation in wild-type Antp (J) and wor>abd-A (K) NB3-3T (arrowhead) pulse-labeled at the indicated times. In K, embryos were grown at 29°C. n, number of NB3-3T scored.