The book of Canadian authors is part of a series of textbooks for in-depth study of various branches of chemistry. It is devoted to bioorganic chemistry as a discipline that uses chemical methods to understand biochemical processes. The peculiarity of the book is that biochemical processes in it are interpreted from the point of view of model reactions. Designed for scientists specializing in bioorganic chemistry, biochemistry, enzymology, teachers, graduate students and senior students of chemical and biological universities.