Found in a linear fashion underlying the epidermis and the basal surface of other epithelia in embryos. Highly expressed in the apical ectodermal ridge of the limb buds from E10.5-E12.5 and expression was also detected in the interdigital spaces at E14.5. Found in cells just underlying the surface epithelium of the entire embryo and in the linings of the peritoneal cavity and dorsal aorta. At E12 detected in the mesonephric duct and in the lens.
