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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)