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Scientist.com (formerly known as Assay Depot) is a network of public and private e-commerce marketplaces that connect buyers and sellers of scientific research services. [ 1 ] [ 2 ] [ 3 ] The company was founded in 2007 by Kevin Lustig , Chris Petersen and Andrew Martin and launched its first public research marketplace in September 2008.
An assay (analysis) is never an isolated process, as it must be accompanied with pre- and post-analytic procedures. Both the communication order (the request to perform an assay plus related information) and the handling of the specimen itself (the collecting, documenting, transporting, and processing done before beginning the assay) are pre-analytic steps.
The primer design for all primers pairs has to be optimized so that all primer pairs can work at the same annealing temperature during PCR. Multiplex-PCR was first described in 1988 as a method to detect deletions in the dystrophin gene. [1] It has also been used with the steroid sulfatase gene. [2]
For this reason, it is critical to accurately predict the melting curve of PCR products when designing primers that will distinguish sequence variants. Specialty software, such as uMelt [13] and DesignSignatures, [14] are available to help design primers that will maximize melting curve variability specifically for high-resolution melting assays.
In the case of TRF assays, a wash step is required to remove unbound fluorescent reagents prior to measuring the activity signal of the assay. This increases reagent use, time to complete the assay, and limits the ability to miniaturize the system (e.g. converting from a 384-well microtiter plate to a 1536-well plate). [5]
Multi-step assays are often called separation immunoassays or heterogeneous immunoassays. Some immunoassays can be carried out simply by mixing the reagents and samples and making a physical measurement. Such assays are called homogeneous immunoassays, or less frequently non-separation immunoassays.
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How to use a microarray for genotyping. The video shows the process of extracting genotypes from a human spit sample using microarrays. Genotyping is a major use of DNA microarrays, but with some modifications they can also be used for other purposes such as measurement of gene expression and epigenetic markers.
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