logit

In competitive binding assays, the logit-log dose relationship, in which the response is defined by: $R = logit y = log 10 ( y 1 − y )$ where $y = b b 0$ with $b$ = fraction of tracer bound and $b 0$ = value of $b$ with no unlabelled ligand in the system. Logit transformed assay data frequently yield straight-line dose-response curves, amenable to statistical analysis.

Source:

PAC, 1994, 66, 2513 (Nomenclature for radioanalytical chemistry (IUPAC Recommendations 1994)) on page 2522