Responsive Web Design: The formats of the main page types now use responsive web design to adapt gracefully to different screen widths, from desktop monitors to cell phones. The new page design also simplifies retrieval of SMILES and InChI strings. Results Filters: BindingDB's tabular presentation of search results (Figure ) has been outfitted with a filter tool, which allows users to slice out search results along various dimensions. For example, the filter tool in Figure shows that all 997 data pertain to a single protein target but derive from 34 publications; clicking on "34" yields a pull-down menu of the publications which allows viewing the data from each individual publication. Similarly, one may select the data according to the 14 institutions where the various publications originated; select data within a given affinity range; choose the eight protein-ligand pairs with a corresponding co-crystal structure in the Protein Data Bank; or choose the 22 results for which BindingDB has identified that the ligand is commercially purchasable. These filtration options are particularly useful to refine an initial search or browse operation that has generated an excessively large set of results.