PCDq is a human protein complex database with quality index, which tells us the evidence level as
members of the protein complex. We predicted human protein complexes from integrated PPI network data
by finding densely connected regions with their cluster properties in the PPI network.
We annotated the predicted complexes with our defined procedures by human curators that confirm the existence of the complex actually available
in references. We integrated data entities such as protein function, localization, structure, expression profile, gene locus,
and binary interactions among complex member proteins and complex outside adjacent proteins.
References: Kikugawa S, Nishikata K, Murakami K, Sato Y, Suzuki M, Altaf-Ul-Amin M, Kanaya S, Imanishi T. PCDq: human protein complex database with quality index which summarizes different levels of evidences of protein complexes predicted H-Invitational protein-protein interactions integrative dataset. BMC Syst. Biol. 2012. in press.