Heterogeneity across the dorso-ventral axis in zebrafish EVL is regulated by a novel module consisting of sox, snail1a and max genes

► The outermost embryonic epithelium in zebrafish, the enveloping layer, is patterned. ► The patterning across DV axis is revealed by a reporter line using a crestin promoter. ► This pattern is regulated by sox, snail and max genes.