This is a network of protein–protein interactions from PDZBase.
Source
Data downloaded from http://konect.uni-koblenz.de/ orginaly from http://research.mssm.edu/maayan/datasets/qualitative_networks.shtml
References
Jerome Kunegis. KONECT - The Koblenz Network Collection. In Proc. Int. Web Observatory Workshop, pages 1343-1350, 2013.
Thijs Beuming, Lucy Skrabanek, Masha Y. Niv, Piali Mukherjee, and Harel Weinstein. PDZBase: A protein--protein interaction database for PDZ-domains. Bioinformatics, 21(6):827--828, 2005.