Table 1 Description of the model parameters.

From: Analysis of variable-order fractional enzyme kinetics model with time delay

Symbol

Meaning

\(\mathbb {S}(t)\)

Substrate concentration at time \(t\)

\(\mathbb {E}(t)\)

Free enzyme concentration at time \(t\)

\(\mathbb {H}(t)\)

Enzyme-substrate complex concentration at time \(t\)

\(\mathbb {P}(t)\)

Product concentration at time \(t\)

\(\beta _{1}\)

Rate constant for enzyme binding

\(\beta _{2}\)

Rate constant for product formation

\(\beta _{3}\)

Rate constant for catalysis

\(\tau _{1}, \tau _{2}\)

Constant delays