We've been fans of the Molecule of the Month series by David Goodsell, for many years. Not only is Dr. Goodsell a talented artist but he writes very clear descriptions of the ways molecules like proteins, RNA, and DNA work together and function inside a cell.
To learn about proteins and their activities, I like to go directly to the Molecule of the Month
page, where I can find a list of articles organized by molecule type and name. Many of these articles can also be downloaded in a PDF format.
A really nice of his articles is that he includes PDB IDs ... Read more