-70.6 0 CHO A difference in inward rectification and polyamine block and permeation between the Kir2.1 and Kir3.1/Kir3.4 K+ channels. J. Physiol. (Lond.), 2005, 568, 749-66 1 /(1+exp((v-(-96.48))/23.26)) 3.7 +( -3.37 / (1 + exp((v - -32.9)/27.93))) 1 /(1+exp((v-(-168.28))/-44.13)) 0.85 + (306.3 / (1 + exp((v - -118.29)/-27.23)))