Fig. 2

Expression of transcription factors in or near the ciliary band. a–l Lv-ap2 is expressed starting at 24 hpf in the oral ectoderm near the ciliary band (bracket in h) where it remains through 32 hpf. m–x Lv-ese is expressed in the non-skeletogenic mesoderm from 10 to 22 hpf. At 22 hpf, Lv-ese is expressed in the lateral ciliary band (shown in bracket in t, inset image shows lateral perspective). It remains in cells of the lateral ciliary band and also turns on in the postoral neurons (shown in inset images in v–x). a′–l′ Lv-scratch is expressed beginning at 24 hpf in cells scattered in the ciliary band. Cells expressing Lv-scratch increase in number through 32 hpf. m′–x′ Lv-prox is expressed in the non-skeletogenic mesoderm until 32 hpf when it is also expressed throughout the ciliary band (arrow heads in x′). Scale bars = 50 μm