This website has an extensive amount of images of macromolecules. Though there are no real interactive portions of the site or instructions on the best way to navigate the site, there is certainly a lot of information to sort through. Proteins are sorted by size, or by alpha/beta, domain, or whether they are a surface/membrane protein. From there thousands of characterized protein structures are available in list format. References to the scientific paper in which the structure was ellucidated is included with each image. This provides the student with the ability to further their search on their protein of interest by investigating the provided reference material.