As with all the books in the At a Glance series, the aim of the approach is to reduce frills to zero, to condense words to the absolute minimum and to make the illustrations the primary tool of communication. The text repeats some of what is in the drawings and adds further basic information. It is not intended to try to raplace existing textbooks of biochemistry, but to provide students with a tool with which they can revise rapidly, economically and with confidence. It will also serve as a useful introductory book for those who do not need to a great deal of detail about biochemistry. It is therefore aimed at the student who wants essential information available literally at a glance.