For students studying genetics and biology, this very nice bioinformatics tutorial from Bates College will be most useful. Created by staff members in the chemistry and biology departments, the tutorial is designed to help students learn about how to compare the molecular structures of different enzymes and also how to use online DNA and protein sequence databases. The tutorial contains step-by-step instructions, complemented by screen shots and other illustrative materials. Visitors can also use the sections on the homepage to browse around the different areas of the tutorial. Also, the site contains a host of additional links to other sites that address some of the basic principles behind bioinformatics.