-65.0 0 Oocyte Expression of a cloned rat brain potassium channel in Xenopus oocytes. Science, 1989, 244, 221-4 1.0000/(1+ exp((v - -30.5000)/-11.3943)) 30.0000/(1+ exp((v - -76.5600)/26.1479)) 1.0000/(1+ exp((v - -30.0000)/27.3943)) 15000.0000/(1+ exp((v - -160.5600)/-100.0000))