Molecular Cell Biology provides a comprehensive, authoritative introduction to the current state of knowledge in this dynamic field. In the fourth edition, the authors have introduced new pedagogy for the reader, streamlined coverage, and integrated media and text to provide students in upper division cell and molecular biology courses with the clearest possible understanding of cell function at the molecular and cellular level. Founded on the work of scientists past and present, the experimental techniques that have generated their data, and the key concepts that inform our understanding of biology, the fourth edition of Molecular Cell Biology is the most up-to-date text available. New Instructor Online Update Service, powered by Nature Publishing Group Every October and July, in time for your upcoming semester, qualified instructors can access full review articles selected from Nature Reviews Molecular Cell Biology and keyed to sections of the textbook that the articles update. Instructors register for this service on the Instructor Web site to receive password to the protected site. For more information, see Media.