<p><i><b>Current Topics in Membranes</b> </i>is targeted towards scientists and researchers in biochemistry and molecular and cellular biology, providing the necessary membrane research to assist them in discovering the current state of a particular field and in learning where that field is heading. In this volume, researchers are encouraged to fully explore topics and research related to co-transport systems. The authors and editors associated with the <b><i>Current Topics in Membranes</b></i> series are recognized as world-renowned scientists in their respective fields, making <b><i>CTM</b></i> one of the premier serials on membranes.</p>