Measuring receptor occupancy is a commodity in the
Post# of 148184
Nice article Measuring Receptor Occupancy With Flow Cytometry
There are 3 common ways to measure RO, either directly or indirectly. Each provides a different type of data, and the experimental needs will dictate what assay to perform. An additional consideration for method choice is the ability of directly conjugated reagents.
https://expert.cheekyscientist.com/measuring-...cytometry/
Here is a long list of similar articles, most done over 5 years ago.
https://onlinelibrary.wiley.com/toc/15524957/2016/90/2