CHAPTER 18 MEMBRANE POTENTIALS 399
(a)
KcsA MscL(b)(c)
20 A°(d)Figure 18.8Structures of two ion channels. (a,c) The KcsA potassium channel, and (b,d) the
MscL mechanosensitive channel. Roderick McKinnon won the Nobel Prize in Chemistry in 2003
for his structural studies on ion channels.