ConsensusPathDB is accessible via the Internet at http://cpdb.molgen.mpg.de. The main functions of the web interface are described here and summarized graphically in Figure 1. The web interface gives information about the database and its current content summarized in overlap tables (Table 1). It is obvious that the content of existing human interaction resources is partially overlapping but, more importantly, complementary to a large extent. The web interface contains documentation in form of a regularly updated tutorial intended to guide the user through the different functions of the web interface and provide further details (Supplementary Material 1).