title: Histochemistry of the juxtaglomerular apparatus in the toad Bufo bufo. The glucose-6-phosphate dehydrogenase activity of the macula densa.
abstract: An investigation regarding the question of whether there exists a macula densa as part of the juxtaglomerular apparatus in the kidney of amphibians has been carried out. With the aid of a histochemical reaction for glucose-6-phosphate dehydrogenase activity, the presence of a macula densa zone as a specialized part of the distal tubule in the toad Bufo bufo was demonstrated. The functional significance of the high glucose-6-phosphate dehydrogenase activity in the macula densa cells is discussed.
mesh_terms: D000818:Animals; D002023:Bufo bufo / Q000033:anatomy & histology*; D005954:Glucosephosphate Dehydrogenase / Q000378:metabolism*; D006651:Histocytochemistry; D007606:Juxtaglomerular Apparatus / Q000033:anatomy & histology / Q000201:enzymology*; D008297:Male
chemical_list: D005954:Glucosephosphate Dehydrogenase