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Table 1 Variables used in the model

From: The sensitivity and significance analysis of parameters in the model of pH regulation on lactic acid production by Lactobacillus bulgaricus

Variable

Description

Units

LACout

Concentration of lactose out of the cells

mol/L

LACin

Concentration of lactose in the cells

mol/L

GLC

Concentration of glucose in the cells

mol/L

PYR

Concentration of pyruvate in the cells

mol/L

LA

Concentration of lactic acid out of the cells

mol/L

LR, LS, LZ

Concentration of LacR protein, lactose permease, β-galactosidase in the cells

mol/L

M

Concentration of the mRNA of lacR gene

mol/L

N

Concentration of the mRNA of lacS and lacZ gene

mol/L

X

Concentration of cell mass

g/L