The potential difference of the frog lens.
D000818:Animals; D001001:Anura; D002463:Cell Membrane Permeability; D002712:Chlorides; D004566:Electrodes; D007908:Lens, Crystalline / Q000502:physiology*; D008297:Male; D008564:Membrane Potentials; D008839:Microelectrodes; D009994:Osmolar Concentration; D010042:Ouabain; D011188:Potassium / Q000378:metabolism; D011199:Potentiometry; D011894:Rana pipiens / Q000502:physiology*; D012964:Sodium / Q000378:metabolism; D013431:Sulfates
D002712:Chlorides; D013431:Sulfates; D010042:Ouabain; D012964:Sodium; D011188:Potassium