title: To the question of water and urea-insoluble residue of the lens.
mesh_terms: D000818:Animals; D002417:Cattle; D003459:Crystallins / Q000032:analysis*; D007908:Lens, Crystalline / Q000032:analysis*; D008722:Methods; D012995:Solubility; D014508:Urea; D014867:Water / Q000032:analysis
chemical_list: D003459:Crystallins; D014867:Water; D014508:Urea