Hit Identification

Hit identification is the process by which chemically tractable compounds showing reproducible, concentration-dependent activity against a validated target...

Hit identification is the process by which chemically tractable compounds showing reproducible, concentration-dependent activity against a validated target are identified from a compound library, using either physical high-throughput screening of a compound collection against the biological target or the virtual screening and molecular docking approaches described in detail in Phase 1 of this text. A genuine hit must satisfy several criteria beyond simple activity: the observed activity must be dose-dependent and reproducible across independent assay runs, must not arise from a known assay-interference mechanism (such as compound aggregation or fluorescence artefact), and the compound must possess a chemical structure amenable to synthetic modification, since a hit that cannot be readily elaborated chemically offers little practical value regardless of its potency.