The phrase "as a complementary assay" is correct and usable in written English.
It can be used in scientific or technical contexts when referring to an additional test or method that supports or enhances the results of a primary assay.
Example: "We conducted the primary assay to measure enzyme activity, and we also performed a complementary assay to validate our findings."
Alternatives: "as an additional test" or "as a supporting assay".
As a complementary assay we used the adenylate kinase (AK) release assay, Toxilight®BioAssay (Lonza), to quantify necrotic cell death.
Co-IP is usually used as a complementary assay to confirm the direct interaction identified by other biophysical methods [ 81, 84, 86, 89- 92].
Recently, there has been an increasing interest in detecting the circulating HER-2 protein in serum samples for use as a complementary assay to IHC and FISH analysis for diagnosis, but also for use as a prognostic marker for breast cancer recurrence [ 46, 47].
A complementary assay, the enzyme-linked immunosorbent assay (ELISA), is under development.
We used a complementary assay for characterizing the degree of cell sorting.
In these cases, a complementary assay to confirm the presence or absence of antigen-specific response may instead be a viable alternative to assay repeats.
As a complementary test to the MTT assay, the cells were evaluated qualitatively with an optical microscope (200X) (Figures S5 and S6).
Gene functions are usually derived by classic biochemical studies such as complementary assays, cloning, enzyme substrate and activity tests, protein interaction tests and gene knockouts or conditional knockouts in the organism of interest.
Protein expression of Ki67, Cyclin D1, and Cyclin E was assayed, as a complementary panel.
The assay appears as a complementary tool for LTBI screening, identifying cases not found with the other tests.
As a complementary test, the Q-FISH was assayed by Telomere PNA FISH Kit/Cy3, code K5326, Dako, Denemark (http://www.dako.com/ar42/p107840/prod_products.htm).htm
