Defective adult pigment stripes in <i>seurat</i> mutants.

<p>Shown are adult fish (A, B, C) and details of patterns (A′, B′, C′). (A, A′) Wild-type fish exhibit several dark stripes of melanophores and iridophores, as well as light “interstripes” of xanthophores and iridophores. (B, B′) Homozygous <i>seurat^utr15e1</i> mutants exhibit irregular spots of melanophores. (C, C′) <i>seurat^wp15e2</i>/<i>seurat^utr15e1</i> fish exhibit a less severe stripe defect, most evident ventrally (arrowhead). <i>seurat^wp15e3</i>/<i>seurat^utr15e1</i> exhibit a phenotype indistinguishable from <i>seurat^wp15e2</i>/<i>seurat^utr15e1</i>. At this stage, <i>seurat^wp15e2</i> and <i>seurat^wp15e3</i> are nearly indistinguishable from the wild-type when homozygous, though phenotypes are more apparent during the initial stages of stripe formation (not shown). Scale bar: in (A′), 1 mm for (A′–C′).