"the expression level" is correct and usable in written English.
The phrase means the amount or degree to which something is expressed. For example, "The expression level of the artist was enchanting."
The expression level was calculated using the relative quantification method.
The expression level of WT was used as a reference.
The expression level of Xoc- responsive related genes.
Color represents the expression level relative to mean.
The expression level was also reached to 200 mg/L.
The expression level of APJ was measured by western blotting.
Thus, in the examined cells, the overexpression of SP3 decreased the expression level of TFF2, whereas the inhibition of SP3 increased the expression level of TFF2.
There was variation in the expression level of OsCKX2 among the selected transformants.
It is evident that the expression level of the control gene actin was indistinguishable (Fig. 3a).
The expression level of PTGDS was estimated by ELISA assay (Fig. 4).
The values thus reflect the expression level of each gene tested.
