Lehninger Principles of Biochemistry has been a classroom favourite since its first edition. It is the classic introduction to biochemistry that brings clarity and coherence to an often unwieldy discipline, a textbook on the field's classic core, always made fresh by combining the field's definitive advances with an admirable ability to reach students. In addition to content updates throughout and more emphasis on medical relevance, the fifth edition provides updated pedagogy that supports lecturers in addressing key challenges in teaching the biochemistry course. This book is supported by a companion website (www.whfreeman.com/lehninger5e), which provides a variety of study tools to aid understanding and learning including animated enzyme mechanisms and biochemical techniques, interactive quizzes, molecular structure tutorials and interactive quizzes.