Insights That Move the GPCR Field Forward

GPCR biologic drugs stabilize receptor active states through distributed contact networks small molecules have trouble reproducing. The affinity-trap account, treated as a model rather than a verdict, explains a recurring difficulty at family B GPCR programs.

Binding affinity appears straightforward: add ligand, measure signal, fit a curve. Yet discovery teams routinely lose time and misallocate resources because the underlying biology behaves nothing like the idealized systems we learned in textbooks. GPCRs couple, decouple, isomerize, deplete tracers, and shift apparent affinity depending on stoichiometry and time. The result is a recurring pattern across programs—clean data that is not actually telling the truth. Orthosteric bi