A structural constituent of eye lens. Acts upstream of or within lens development in camera-type eye and morphogenesis of an epithelium. Is expressed in alimentary system; eye; and genitourinary system. Used to study cataract 20 multiple types. Human ortholog(s) of this gene implicated in cataract 20 multiple types. Orthologous to human CRYGS (crystallin gamma S). [provided by Alliance of Genome Resources, Apr 2022]