bookmark rxncon Allows to build, visualize and model cellular signal transduction networks. The rxncon language enables the description of these networks. The rxncon software tool interprets the rxncon language and automates export into a range of graphical and mathematical formats. In the rxncon framework, cellular signal transduction networks are described at the same granularity as empirical data. The user defines the network as one reaction list and one contingency list. From these data mathematical and graphical representation can be generated. The network can be modified and extended iteratively, and both visualization and mathematical models can be generated automatically at any time.