Tfh cell type–specific active enhancers. (A) A differentially acetylated enhancer 5′ of the PDCD1 gene locus in Tfh cells is shown (red bar). Normalized RNA sequencing read density from each cell type at the PDCD1 gene locus is shown below. (B) A differentially acetylated enhancer in intron 1 of the BCL6 gene locus in Tfh cells is shown (red bar). Normalized RNA sequencing read density from each cell type at the BCL6 gene locus is shown below.