Before revision:  We measure the fold-change in gene expression at different inducer concentrations in a collection of strains that span a  range of repressor copy numbers and operator binding strengths . After inferring the inducer dissociation constants using data from one of these strains, we show the broad reach of the model by predicting the induction profiles of all other strains  .
After revision:  We measure the fold-change in gene expression at different inducer concentrations in a collection of strains that span a range of repressor copy numbers and operator binding strengths . After inferring the inducer dissociation constants using data from one of these strains, we show the broad reach of the model by predicting the induction profiles of these strains but also enables us to derive analytic expressions for key properties such as the dynamic range and .