F11R and hereditary disease: Two of the genes, f11r and cd9b, which displayed enriched expression in the primordium, were selected for loss-of-function analysis, based on their known roles in a large variety of physiological and pathological processes such as the immune response, reproduction and development, infectious and genetic diseases as well as metastasis, where both promote cell adhesion and motility [28-32] and also because of their unknown function in the lateral line development.