Reader-friendly Cell Biology, 4th Edition, provides a concise but comprehensive foundation for students entering research or health care career paths. Award winning illustrations help readers quickly grasp general principles. The authors have thoroughly updated this popular text to provide readers with the current understanding of the principles of normal cellular function along with examples of how molecular defects predispose to human disease. Major new themes in the 4th edition include the roles of intrinsically disordered polypeptides and phase separation in cellular functions, the influence of new molecular structures on understanding mechanisms, and the impact of exciting new methods—from single cell RNA sequencing to second generation super resolution fluorescence microscopy—on advancing our understanding.