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 5'214'234 proteins from 1133 organisms.

STRING (Search Tool for the Retrieval of Interacting Genes/Proteins) is being developed at CPR, EMBL, SIB, KU, TUD and UZH.
STRING references: Franceschini et al. 2013  /  2011  /  2009  /  2007  /  2005  /  2003  /  Snel et al. 2000.
Miscellaneous: Access Statistics, Robot Access Guide, STRING/STITCH Blog, Supported Browsers.
 
Warning: You're looking at an outdated version of STRING (v9.1). For the latest release, click here.
Sister Projects: check out STITCH and eggNOG - two sister projects built on STRING data!
Previous Releases: Trying to reproduce an earlier finding? Confused? Refer to our old releases.