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Brief Communication

Nature Genetics 36, 1059–1060 (1 October 2004) | doi:10.1038/ng1427

Regulatory evolution across the protein interaction network

Bernardo Lemos , Colin D Meiklejohn & Daniel L Hartl

Protein-protein interactions may impose constraints on both structural and regulatory evolution. Here we show that protein-protein interactions are negatively associated with evolutionary variation in gene expression.