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Life Sciences
Competitive Immunoassays
In competitive ELISA Assays, the antigen in a sample competes for limited antibody binding sites with antigen conjugated to a…
Tue, Jul 18, 2023
When is it appropriate to use a CLIA instead of an EIA?
A CLIA, or chemiluminescent immunoassay, is more sensitive than an EIA (enzyme immunoassay) and is used when samples contain very…
Tue, Jul 18, 2023
What kind of instrumentation is required to read a CLIA assay?
A plate luminometer is necessary to read the RLU (relative light units) generated by these assays. It is not necessary…
Tue, Jul 18, 2023
Edge Effects
Where was the plate incubated? Often times the conditions for ambient incubations can be less than ideal. If there is…
Tue, Jul 18, 2023
Poor Standard Curve
What was used as the standard diluent? Diluents other than the supplied assay buffer may contain interfering substances that can…
Tue, Jul 18, 2023
Poor Precision
Were the wells washed properly? All wells receive the same treatment during the wash step. If some are washed less…
Tue, Jul 18, 2023
Drift
Were reagents brought to room temperature prior to use? If the reagents are not at a constant temperature prior to…
Tue, Jul 18, 2023
Weak Color Development
Was substrate added at the correct point in the assay? See the assay procedure provided in the instruction manual. Were…
Tue, Jul 18, 2023
High Background
How was the plate washed? It is important that the plate is washed thoroughly. If plate washing is troublesome, a…
Tue, Jul 18, 2023
How long can the Cyto-ID® green detection reagent be left incubating with live cells (mins/hours/days)?
We do not recommend to incubate cells with Cyto-ID® green detection reagent for longer that 30 minutes at 37°C. In…
Tue, Jul 18, 2023