Kidney TubulesKidney Tubules, ProximalKidneyKidney Tubules, CollectingKidney CortexNephronsKidney Tubules, DistalKidney MedullaGlutamineMalpighian TubulesSodium-Potassium-Exchanging ATPaseEpitheliumKidney DiseasesGluconeogenesisMicroscopy, ElectronKidney TransplantationTissue DistributionEpithelial CellsImmunohistochemistrySpecimen HandlingDogsCell LineAcute Kidney InjuryRNA, MessengerMolecular Sequence DataKidney GlomerulusKidney Failure, ChronicKidney NeoplasmsPolycystic Kidney DiseasesKidney Function TestsKidney CalculiPolycystic Kidney, Autosomal DominantGlomerular Filtration RateKidney Concentrating AbilityPolymerase Chain ReactionSensitivity and SpecificityBiopsy