Urry D W, Jing N, Prasad K U
Biochim Biophys Acta. 1987 Aug 7;902(1):137-44. doi: 10.1016/0005-2736(87)90144-1.
Single-channel conductance data on four different gramicidin channel lengths demonstrate that conductance magnitude is neither inversely dependent on the square of the channel length nor on the image force arising from differences in the extent of lipid dimpling (Jordan and Vayl (1985) Biochim. Biophys. Acta 818, 416-420). Rather the conductance differences are consistent with the decreased off-rate constant for the singly occupied state as the ionic radius decreases from that of cesium ion to sodium ion coupled with the decreased probability of the doubly occupied channel due to increased ion-ion repulsion as the channel is shortened (Urry et al. (1984) Biochim. Biophys. Acta 774, 115-119).
关于四种不同短杆菌肽通道长度的单通道电导数据表明，电导大小既不反比于通道长度的平方，也不依赖于脂质凹陷程度差异所产生的镜像力（乔丹和韦尔（1985年），《生物化学与生物物理学报》818卷，416 - 420页）。相反，电导差异与单占据态的解离速率常数降低相一致，这是由于离子半径从铯离子减小到钠离子，同时随着通道缩短，由于离子 - 离子排斥增加，双占据通道的概率降低（厄里等人（1984年），《生物化学与生物物理学报》774卷，115 - 119页）。
