The phrase "assay of a single" is correct and usable in written English.
It can be used in scientific or technical contexts, particularly in reference to the analysis or examination of a single sample or entity.
Example: "The assay of a single specimen revealed significant levels of contamination."
Alternatives: "analysis of a single" or "examination of a single".
Further, and possibly more importantly, the large number of genes assayed on a single array and the relatively small number of samples profiled generally provide too few measurements to constrain potential models, and arrive at an optimal solution.
The advantage but also challenge of a multiplex array is the combination of several assays on a single platform.
In addition, inadequate DNA template may prevent the performance of multiple assays on a single sample [ 7].
However, this approach is not well-suited for molecular diagnostic applications requiring simultaneous assaying of a single sample for multiple phosphoprotein targets.
However, methylation assays of a single gene frequently result in a low sensitivity (of less than 30%); therefore, analyses of several genes have been accomplished, resulting in a more reasonable sensitivity with high specificity in breast cancer detection [ 50].
Mutants with promoter activity in the range of 80 120% of the wild-type were grouped with the wild-type, because that level of variability could be found with independent assays of a single culture (Chiang and Howe 1993).
Although these studies represent assays of a single gene for chimeras, the degree of polymorphism between the two CHS contigs was such (10 mismatches per contig of 1200 nt) that data on this gene likely represent the top end of the problem, where single nucleotide differences would impact the proteins encoded, since on average 5SNPs were found per contig.
From a gross statistical approach, there is not sufficient separation across the averages of assays for a single conformer per compound to say definitively there is a clear separation between NN and NI pairs.
Most of the markers mapped in this study were localized to a single map position, as was also the case for the majority of markers mapped with the wheat 90K array (Wang et al. 2014), indicating that most SNP assays are specific to a single locus and/or assaying segregation of a single locus.
