The phrase "using the assay" is correct and usable in written English.
You can use it when referring to a process that involves an assay or analysis. For example: "The scientists used the assay to analyze the data and determine the accuracy of the results."
These findings prompted us to test whether Slx9-1 binds to RanQLGTP in vitro, using the assay described above.
Glucose and glycerol concentrations in medium were measured by using the assay kits.
FRAP of the samples was tested using the assay of Oyaizu [46].
A total of 226 duck sera samples were tested using the assay.
The endoglucanase and β-glucosidase activities were measured using the assay methods as mentioned in the above section.
The ferric-reducing antioxidant power (FRAP) of the extracts and reference was tested using the assay of Oyaizu [16] based on the chemical reaction of Fe(III) = > Fe(II).
The luciferase assays were performed using the assay kit from Promega according to manufacturer's recommendation.
Before using the assay to monitor the interactions of the sigma factors with core RNAP, it was important to fully characterize the assay components and understand the assumptions that are made when using the assay.
Protein concentration was measured using the assay provided with the kit (Precision Red™ Advanced Protein) and 1.5 µg of tissue extract added per well.
Using the assay protocol, we determined serum VLDL-TG levels in 69 fasting patients with biopsy-proven HCV-related chronic liver disease and 50 healthy subjects.
Probes and primers have been selected with the publically available software http://www5.appliedbiosystems.com/tools/ and can be retrieved by using the assay ID reported in Tables 2, 3 and S4.
