Transcription regulation networks control the expression of genes. The transcription networks of well-studied microorganisms appear to be made up of a small set of recurring regulation patterns, called network motifs.
The same network motifs have recently been found in diverse organisms from bacteria to humans, suggesting that they serve as basic building blocks of transcription networks.
See also
signalling networks
neuronal networks
References
Alon U. Network motifs: theory and experimental approaches. Nat Rev Genet. 2007 Jun;8(6):450-61. PMID: 17510665