title: Age-dependent changes in the activities of ATPase and some pyridine nucleotide-linked enzymes in the chick testis.
abstract: The ontogeny of some of the enzymes connected with carbohydrate metabolism in the testis were studied in the White-Rock chicks. In the first place testicular growth in these chicks relate to their overall growth as measured by their body weights. ATPase and NAD+-dependent succinic dehydrogenase activities decreased both with advancing age and increasing testicular weight. However, these enzymes showed maximum activities at 17 and 28 weeks respectively. NAD+-linked isocitric dehydrogenase activity continually increased with increasing testicular weight and age. It is suggested that during spermatogenesis the activities of these enzymes are controlled by different developmental mechanisms.
mesh_terms: D000251:Adenosine Triphosphatases / Q000378:metabolism*; D000375:Aging; D000818:Animals; D001835:Body Weight; D002645:Chickens; D005260:Female; D007521:Isocitrate Dehydrogenase / Q000378:metabolism*; D008297:Male; D009243:NAD / Q000494:pharmacology; D009929:Organ Size; D013385:Succinate Dehydrogenase / Q000378:metabolism*; D013737:Testis / Q000201:enzymology*
chemical_list: D009243:NAD; D007521:Isocitrate Dehydrogenase; D013385:Succinate Dehydrogenase; D000251:Adenosine Triphosphatases