Developmental changes and control of xanthine dehydrogenases in developing chicks
[摘要] Developmentalchangesinxanthinedehydrogenaseactivityofliver,kidney,pancreas,andduodenumhavebeendescribed.Activityishighinthekidneybeforehatching,butneverthelessthereisasignificantincreaseathatching.Activitiesintheliverandduodenumincreasesharplyathatchingandactivityinthepancreasincreasessubsequenttohatching.Injectionofpituitaryextractsintodevelopingeggsondays16,17,and18resultsinaprecociousincreaseinliverxanthinedehydrogenaseactivityobservedonday19.Theagentresponsiblehasnotyetbeenidentified.Theincreaseinpancreaticxanthinedehydrogenaseisdependentuponfeedingafterhatchingwhereasactivityinothertissuesstudiedisnot.Apparentlytheactoffeedingitselforsomecomponentinthedietinducesthisresponse.Thesestudiesindicatethatatleastthreedifferentcontrolmechanismsforxanthinedehydrogenasearepresentinchicks.
[发布日期] [发布机构]
[效力级别] [学科分类] 生物科学（综合）
[关键词] [时效性]
