Possible role of dark cells of the collecting tubules in acidification of the urine.
D000138:Acidosis / Q000473:pathology / Q000652:urine; D000818:Animals; D004032:Diet; D006863:Hydrogen-Ion Concentration; D002479:Inclusion Bodies / Q000648:ultrastructure; D007671:Kidney Concentrating Ability; D007684:Kidney Tubules / Q000502:physiology* / Q000648:ultrastructure; D008297:Male; D008854:Microscopy, Electron; D008870:Microtubules / Q000648:ultrastructure; D008928:Mitochondria / Q000648:ultrastructure; D051381:Rats; D013270:Stomach / Q000648:ultrastructure