The phrase "as a function of substrate concentration" is correct and usable in written English.
It is typically used in scientific contexts, particularly in biology and chemistry, to describe how one variable changes in relation to substrate concentration.
Example: "The rate of the reaction increases as a function of substrate concentration, reaching a maximum at saturation."
Alternatives: "in relation to substrate concentration" or "depending on substrate concentration".
The rate constants for the reaction with DPPH radical were measured spectrophotometrically by monitoring the loss of DPPH radical as a function of substrate concentration.
The partition function f([S]) (≡ [Cout] + [CoutS])/([Cin] + [CinS])) describes the ratio of Cout to Cin as a function of substrate concentration, and f(0) and f are the corresponding values at zero and saturated substrate concentration, respectively (Zhang et al. 2015).
Red substrate 2 (hereafter referred to as substrate) was further evaluated in 384-well plates by recording the initial reaction rates as a function of substrate concentration.
In order to assess whether the Km value determined from the variation of ATP hydrolysis rate as a function of substrate concentration, truly reflected a difference in ATP binding, we measured the apparent equilibrium dissociation constant (KD) of ATP for DDX3wt and DDX3ΔINS, in the absence of catalysis, by directly UV-crosslinking [α33P]-ATP to the enzyme active site (Fig. 3 F).
An inhibiting influence of excess GSH on Glo1 activity was reported earlier as competitive inhibition to the hemi-mercaptal substrate [37], while low concentration was found to favor MGO detoxification via the aldose reductase (ALR2) pathway, possibly as a function of substrate concentration in consequence to hemi-thioacetal formation [38].
Data of enzymatic activity as a function of substrate concentration were fitted to Michaelis-Menten equation.
CKm activity, as a function of substrate concentrations, was measured by varying creatine phosphate between 1 mM and 25 mM and ADP between 50 μM and 700 μM.
This limiting dilution rate as a function of substrate feed concentration with various values of stripping factor is also presented.
Graphic representation of the Michaelis-Menten equation corresponding to the initial velocity of CdPRAC and PaHyPRE as function of substrate concentration is shown, as well as respective Km and Vmax kinetic values (Figure 4A and 4B).
For both mutants and for both substrates at each pH value, kobs was a linear function of substrate concentration, as expected for a second-order reaction.
Deposition rates and film morphology were studied as a function of substrate nominal temperature, gas concentration and flux.
