<p>1. Introduction: Claudins, tight junctions and the paracellular barrier </p> <p>Mikio Furuse</p> <p>2. Morphological studies of claudins in the tight junction </p> <p>Eveline E. Schneeberger</p> <p>3. Biophysical methods to study claudin permeability </p> <p>Dorothee Günzel, Susanne M. Krug, Rita Rosenthal, Michael Fromm</p> <p>4. Structure-function studies of the claudin pore </p> <p>Alan Yu</p> <p>5. The investigation of cis- and trans-interactions between claudins </p> <p>Reiner F. Haseloff, Jörg Piontek and Ingolf E. Blasig</p> <p>6. Regulation of claudins by post-translational modifications and cell signaling cascades </p> <p>Lorenza González-Mariscal, Erika Garay and Miguel Quirós</p> <p>7. Claudins and renal calcium handling </p> <p>Jianghui Hou and Martin Konrad</p> <p>8. Claudins and lung function </p> <p>Kwang-Jin Kim, Ulf Per Flodby, Zea Borok and Edward Crandall</p> <p>9. Claudins in Intestinal Function and Disease </p> <p>Roland Bücker, Michael Schumann, Salah Amasheh, Jörg-Dieter Schulzke</p> <p>10. Claudin Proteins And Neuronal Function </p> <p>Jérôme Devaux, Bozena Fykkolodziej and Alexander Gow</p> <p>11. Claudin is skin deep </p> <p>Kursad Turksen and Tammy-Claire Troy</p> <p>12. The involvement of tight junction protein claudin-1 in hepatitis C virus entry </p> <p>Christopher Davis, Helen J. Harris and Jane A. McKeating</p> <p>13. Claudins in cancer biology </p> <p>Blanca L. Valle and Patrice J. Morin</p>