South African clawed frog

South African clawed frog, Xenopus laevis Fed worms from lead-contaminated soils ... 

Newt, Triturus cristatus, adults, held in tank with a zinc-plated base South African clawed frog, Xenopus laevis 200 to 3000 overa 7-day period Zinc-poisoned newts were lethargic, ate poorly, and had skin darkening prior to death. Zinc residues were elevated in kidney, brain, liver, and intestine, when compared to controls. The hippocampus region of the brain of poisoned newts contained zinc-rich cells 82... 

Oocytes from the South African clawed frog, Xenopus laevis, provide a reliable and powerful system for the transient heterologous expression of proteins. The use of this expression system has become very popular as oocytes have a high translational capacity and they are able to express multi-subunit proteins derived from exogenously introduced RNA or DNA. Furthermore, the expressed receptors frequently appear to be correctly assembled, post-translationally modified and oriented to the appropriate site. The relative scarcity of endogenous ion channels in the oocyte membrane makes it a versatile tool for the study of a range of heterologously expressed ion channel proteins. 

South African clawed frog, Xenopus laevis... 

The adrenotoxic potency of a series of environmental pollutants were also compared in two amphibian species37, using an adrenal cell preparation similar to the one used in the fish study. Cells of X. laevis, the South African clawed frog, and R. catesbeiana, the bullfrog, were compared for their sensitivity to Cd, endosulfan... 

Boron may be an essential nutrient in several species of aquatic vertebrates. Insufficient boron (<3.0 p,g B/L 62.0 xg B/kg ration) interfered with the normal development of the South African clawed frog, Xenopus laevis, during organogenesis, and substantially impaired normal reproductive function in adult frogs. Impaired growth of rainbow trout (Oncorhynchus mykiss) embryos was documented at < 90.0 xg B/L, and death of zebrafish (Brachydanio rerio) embryos at <2.0 xg B/L. 

The leopard frog (Rana pipiens) did not metamorphose during exposure to 1.0 xg methylmercury/L for 4 months. In the South African clawed frog (Xenopus laevis), a total mercury concentration of 0.49mg/kg FW gonad was associated with impaired gamete function and reduction in survival of early... 

River frog, Rana heckscheri, 459 South African clawed frog, Xenopus laevis, 68,459,486, 547, 709, 111, 847 Southern leopard frog, Rana sphenocephala, 459 Water frog, Rana ridibunda, 85 Wood frog, Rana sylvatica, 68... 

Cui XW, Xiao W, Ke Z, Liu X, Xu XZ, Zhang SQ. Cloning and expression analysis of interferon-y-inducible-lysosomal thiol reductase gene in South African clawed frog (Xenopus laevis). Int Immunopharmacol. 2011 11 2091-7. 

Chou, Y.J. and D.R. Dietrich, 1999. Toxicity of nitromusks in early life-stages of South African clawed frog, Xenopus laevis and zebra- sh, Danio rerio. Ill 17-25. 

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