Current Topics in Membranes 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 Current Topics in Membranes series are recognized as world-renowned scientists in their respective fields, making CTM one of the premier serials on membranes.