Two related measurements can lead to different interpretations.
Affinity and response
A binding assay asks whether and how strongly a ligand associates with a receptor under a test condition. A functional assay asks what happens downstream, such as a measured signalling response. A compound may bind without producing the same response as a reference agonist.
Read both endpoints
In a domain-exchange study of GIP and GLP-1 receptors, researchers tested ligand binding and adenylyl-cyclase activation. The design illustrates why a receptor claim should identify the assay and endpoint. Cell type, receptor expression and the comparator also matter before results can be compared across papers.
When a product description says “acts on a receptor,” ask whether the underlying evidence measures binding, signalling or both.
Sources
Read the original studies or guidance for methods, populations and limitations.
This article is general research information. It is not a Certificate of Analysis for an MC10 product or medical advice. MC10 materials are presented for in-vitro research only.
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