Fig. 1
Pigment cell organization in wild-type and mutant zebrafish. (A) Wild-type zebrafish, and (B1) close up view of the stripe pattern showing light and dark stripe regions. (B2-5) Schematic organization of pigment cells: (B2) xanthophores are compact and densely packed in the light stripe, loose and stellate in the dark stripe; (B3) iridophore layer beneath xanthophores – epithelial-like packing of silvery iridophores in the light stripe, loose and blue in the dark stripe; (B4) melanophores are only present in the dark stripe region; (B5) precise superimposition of all the three cell types results in golden light stripes and blue/black dark stripes. (C) shady lack most iridophores. (D) nacre lacks all the neural crest-derived melanophores. (E) Homozygous leopardtK3/tK3. (F) Heterozygous leopard tK3/+.