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Protein Analysis
What is the minimum recommended dilution for samples? Can I dilute less?
This is the minimum dilution required to eliminate matrix interference in the assay. In general, this data is collected using…
Tue, Jul 18, 2023
Can you explain why I am seeing inconsistent standard curves run in culture media?
Often times, the serum supplemented into media can be problematic. In order to minimize this problem it is very important…
Tue, Jul 18, 2023
Immunoassay Basics
Understanding the basic principles of immunoassays is easy. The essential components of antibody-based immunoassay systems are threefold: an antigen that…
Tue, Jul 18, 2023
Competitive Immunoassays
In competitive ELISA, the antigen in a sample competes for limited antibody binding sites with antigen conjugated to a reporter…
Tue, Jul 18, 2023
Immunometric Assays
Immunometric assays, also known as sandwich assays, use two antibodies specific to the antigen to capture or “sandwich” antigen in…
Tue, Jul 18, 2023
Detection Methods for Immunoassays
The immunological part of an immunoassay ends typically with either a wash or separation step. In these steps, any unbound…
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