Abstract
The Cell Signaling Networks Database (CSNDB) is a database for signaling pathways in human cells. Pathways that connect molecules of interest can be retrieved from CSNDB. The biological attributes, functions, sequences, and structures of the molecules are also included in the database. Since CSNDB is linked to the transcription factor database (TRANSFAC), it also retrieves genes that may be expressed downstream in signaling cascades. We believe that a tool for searching signaling pathways will be important in drug design, chemical safety, and the application of genome information.