SIGNOR, The SIGnaling Network Open Resource, is a collection of manually curated causal relationships between biological entities such as human proteins, chemicals, stimuli, complexes, protein families etc.
The data in SIGNOR can be displayed as a signed, directed graph, representing the activation/inactivation relationships between signaling entities.
The tools offered by the resource allow the user to enrich the annotated data and access a list of manually curated pathways.