Thyroxin specifically stimulates anuran larvae epidermal sodium pump during metamorphosis.
1. Sodium pump, measured as K+-dependent, ouabain sensitive pNPPase, but not the non-specific, ouabain insensitive pNPPase, was stimulated by thyroxin in epidermis of tadpoles of Rana perezi. 2. Epidermal K+-pNPPase of thyroxin treated tadpoles was only stimulated in those stages already showing activity and reached levels similar to adult frogs in tadpoles at metamorphic climax.
Burón
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MI
Departamento de Biologia Celular, Facultad de Ciencias, Universidad de Córdoba, Spain.
Navas
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P
D000818:Animals; D004817:Epidermis / Q000378:metabolism* / Q000502:physiology; D007814:Larva; D008675:Metamorphosis, Biological; D010744:Phosphoric Monoester Hydrolases / Q000032:analysis; D011898:Ranidae / Q000378:metabolism / Q000502:physiology*; D012964:Sodium / Q000378:metabolism*; D013974:Thyroxine / Q000502:physiology*
D012964:Sodium; D010744:Phosphoric Monoester Hydrolases; D013974:Thyroxine