Overview of Membrane Transport.- Classification of Membrane Transporters.- Drug Transport and Targeting.- The Molecular Basis for Hepatobiliary Transport of Organic Cations and Organic Anions.- Affinity of Drugs to the Different Renal Transporters for Organic Anions and Organic Cations.- Drug Disposition and Targeting.- The Mammalian Facilitative Glucose Transporter (GLUT) Family.- Cationic Amino Acid Transporters (CATs).- Electrophysiological Analysis of Renal Na+-Coupled Divalent Anion Transporters.- Dipeptide Transporters.- Antigenic Peptide Transporter.- Nucleoside Transporters of Mammalian Cells.- Multidrug-Resistance Transporters.- Transporters for Bile Acids and Organic Anions.- Molecular and Functional Characteristics of Cloned Human Organic Cation Transporters.- Organic Anion Transporters.- Vitamin B12 Transporters.