Gene expression patterns of zebrafish khdrbs2 and khdrbs3 genes during early development detected by WISH. Stages of embryonic development: 0.45 hpf (A,A′), 3 hpf (B,B′), 6 hpf (C,C′), 10 hpf (D,D′), 14 hpf (E,E′), 24 hpf (F,I,L,F′,I′,L′), 48 hpf (G,J,M,G′,J′,M′), and 72 hpf (H,K,N,H′,K′,N′). Expression sites are labeled with abbreviation as follows. di, diencephalon; ep, epiphysis; hb, hindbrain; hr, hind rhombomeres; hy, hypothalamus; mb, midbrain; re, retina; sp, spinal cord; tec, tectum; teg, tegmentum; tel, telencephalon.