The definitive reference text for biochemistry helps students focus on the most important aspects of biochemistry- the principles! Dave Nelson, Michael Cox, and new co-author Aaron Hoskins identify the most important principles of biochemistry and direct student attention to these with icons and resources targeted to each principle. The 8th edition has been fully updated for focus, approachability, and up-to-date content. New and updated end-of-chapter questions -all available in the Achieve problem library with error-specific feedback and thorough solutions.