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Table 2 Abbreviations of mathematical functions used in the equation set of Table 1

From: PROKARYO: an illustrative and interactive computational model of the lactose operon in the bacterium Escherichia coli

Lac operon mathematical function abbreviations
Ge Extracellular glucose
Le Extracellular lactose
A Intracellular allolactose
Q Intracellular permease
B Intracellular β-Galactosidase
P D Negative effect of external glucose on the initiation rate of transcription (via catabolite repression)
P R Probability that the lactose promoter is not repressed
β L Positive effect of external lactose on its uptake rate
β G Negative effect of external glucose on lactose uptake (inducer exclusion)