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. 2011 Jun 2;2:121. doi: 10.3389/fmicb.2011.00121

Figure 3.

Figure 3

Systems modeling approaches. (A) Network component analysis uses transcriptome data to deduce transcription factor (TF) activities given a TF/gene (g) connectivity network. (B) Genome-scale metabolic models are constructed with all enzymes. With Boolean regulatory constraints, enzymes are either expressed or not expressed. With probabilistic regulatory constraints, the enzyme expression levels are modulated based on expression level of the regulators.