The effect of theophylline on sodium transport across frog-skin in the absence of chloride.
D000818:Animals; D001001:Anura; D001693:Biological Transport, Active / Q000187:drug effects*; D002712:Chlorides; D000242:Cyclic AMP / Q000378:metabolism; D066298:In Vitro Techniques; D008564:Membrane Potentials / Q000187:drug effects; D012867:Skin / Q000378:metabolism*; D012964:Sodium / Q000378:metabolism*; D013806:Theophylline / Q000494:pharmacology*
D002712:Chlorides; D012964:Sodium; D013806:Theophylline; D000242:Cyclic AMP