LPS tolerance is an example of gene-specific regulation of the inflammatory response. Following LPS stimulation of naïve macrophages, both class T and class NT promoters recruit transcription factors and display increased histone acetylation, histone H3K4 trimethylation, and accessibility (represented by yellow starburst). In tolerant macrophages stimulated with LPS, class T promoters are deacetylated and inaccessible. Class NT promoters, on the other hand, are inducibly reacetylated, remethylated, and made accessible with faster kinetics.