Looking at enzymes from an organic chemistry perspective, this updated reference includes information on recent advances in our understanding of enzyme action; topical examples to illustrate key points; two–color figures of the active sites of enzymes discussed in the text to illustrate the interplay between enzyme structure and function; and end–of–chapter problems to allow readers to check their understanding of the material. This concise but comprehensive guide is essential for undergraduate and postgraduate students of organic, bio–organic, and medicinal chemistry, chemical biology, biochemistry, and biotechnology.