An interesting generalization of the network-motifs, '''activity motifs''' are over occurring patterns that can be found when nodes and edges in the network are annotated with quantitative features. For instance, when edges in a metabolic pathways are annotated with the magnitude or timing of the corresponding gene expression, some patterns are over occurring '''given''' the underlying network structure.<ref name="agc">{{cite journal |vauthors=Chechik G, Oh E, Rando O, Weissman J, Regev A, Koller D |title=Activity motifs reveal principles of timing in transcriptional control of the yeast metabolic network |journal=Nat. Biotechnol. |volume=26 |issue=11 |pages=1251–9 |date=November 2008 |pmid=18953355 |pmc=2651818 |doi=10.1038/nbt.1499}}</ref> | An interesting generalization of the network-motifs, '''activity motifs''' are over occurring patterns that can be found when nodes and edges in the network are annotated with quantitative features. For instance, when edges in a metabolic pathways are annotated with the magnitude or timing of the corresponding gene expression, some patterns are over occurring '''given''' the underlying network structure.<ref name="agc">{{cite journal |vauthors=Chechik G, Oh E, Rando O, Weissman J, Regev A, Koller D |title=Activity motifs reveal principles of timing in transcriptional control of the yeast metabolic network |journal=Nat. Biotechnol. |volume=26 |issue=11 |pages=1251–9 |date=November 2008 |pmid=18953355 |pmc=2651818 |doi=10.1038/nbt.1499}}</ref> |