BTK and B-cell chronic lymphocytic leukemia: Beyond these global trends, the variance and distribution of chromatin accessibility across samples was highly gene specific (Fig. 2b and Supplementary Fig. 5c), as illustrated by CLL-linked genes including B-cell surface markers (CD19), B-cell receptor signalling components (CD79A/B, LYN and BTK), common oncogenes (MYCN, KRAS and NRAS) and genes that are recurrently mutated in CLL (NOTCH1, SF3BP1, XPO1 and CDKN1B)17, 18, 29.