NFKB1 and B-cell chronic lymphocytic leukemia: In addition, an alternative 3’ss (HsaALTA1015253-2/3, VastDB nomenclature) downstream of the canonical 3’ss of NFKB1 exon 11, a gene of the NF-κB–signaling pathway, was also detected in the RNA-seq data from CLL patients’ samples and validated in MEC1 cell lines (Fig S3A).