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  • Turkish Journal of Zoology
  • Volume:32 Issue:3
  • Characterization of Branchial Na,K-ATPase from Three Freshwater Fish Species (Oreochromis niloticus,...

Characterization of Branchial Na,K-ATPase from Three Freshwater Fish Species (Oreochromis niloticus, Cyprinus carpio, and Oncorhynchus mykiss)

Authors : Gülüzar ATLI, Mustafa CANLI
Pages : 299-304
View : 17 | Download : 8
Publication Date : 0000-00-00
Article Type : Research Paper
Abstract :Bu çal›flmada farkl› ekolojik gereksinimleri olan üç farkl› tatl› su bal›¤›nda insert ignore into journalissuearticles values(O. niloticus, C. carpio, O. mykiss); solungaç Na,KATPaz enzimlerinin karakterizasyonu yap›lm›flt›r. Ayn› zamanda solungaçlarda Na+, K+ ve Cl- düzeyleri de belirlenmifltir. En yüksek Na,K-ATPaz aktivitesi 100 mM Na+, 20 mM K+, 3-4 mM Mg+2, 1 mM Ouabain deriflimlerinde gözlenmifltir. O. mykiss’da insert ignore into journalissuearticles values(1,07 µmol Pi/mg prot/h);, O. niloticus insert ignore into journalissuearticles values(7,25 µmol Pi/mg prot/h); ve C. carpio insert ignore into journalissuearticles values(7,44 µmol Pi/mg prot/h); ile karfl›laflt›r›ld›¤›nda gözlenen en düflük maximal h›z insert ignore into journalissuearticles values(Vmax); de¤eri, solungaçlardaki yüksek iyon düzeyleri ile iliflkilendirilebilir. Buna karfl›l›k, O. niloticus ve C. carpio’da yar› Vmax de¤erine sahip substrat deriflimleri insert ignore into journalissuearticles values(Km); ise, benzer Vmax de¤erlerine karfl›l›k farkl›l›k göstermektedir. O. niloticus’da C. carpio’ya oranla gözlenen düflük Km de¤erinin, de¤iflen ortam koflullar›nda O. niloticus’un daha dirençli olmas›ndan kaynaklanabilece¤i bildirilmifltir.
Keywords : Fish, gill, ion, Na, K ATPase

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