STRING – Known and Predicted Protein-Protein Interactions
From the website:
STRING is a database of known and predicted protein interactions.
The interactions include direct (physical) and indirect (functional) associations; they are derived from four sources:
- Genomic Context
- High-throughput Experiments
- (Conserved) Coexpression
- Previous Knowledge
STRING quantitatively integrates interaction data from these sources for a large number of organisms, and transfers information between these organisms where applicable. The database currently covers 2,590,259 proteins from 630 organisms. (Note: I had to alter the presentation from the website, which was a table to a list for the sources for the interactions.)
Looks like fertile ground for research on associations.