Aggregated UMI count matrices for intronic and exonic reads mapping in the sense direction of a gene generated using 10X cellranger-arc (https://www.10xgenomics.com/support/software/cell-ranger/latest/analysis/outputs/cr-outputs-h5-matrices) and Seurat (v.4). Cells are filtered for low quality by requiring ≥1,000 ATAC fragments and ≥500 genes detected per nuclei.