Gene expression domains of zebrafish khdrbs1a and khdrbs1b genes in brain detected by WISH and cryosection. Transverse sections of brain structures: telencephalon (E,I,E′,I′), diencephalon (F,J,F′,J′), midbrain (G,K,G′,K′) and hindbrain (C,D,H,L,C′,D′,H′,L′). Brain structure of zebrafish at 24 hpf (A,B,A′,B′). Straight lines, representing slice positions, are marked by English letters corresponding to the section images. Expression sites are labeled with abbreviation as follows. lln, lateral line neuromast.