Interestingly, RNA-seq data from CAG-A3B lymphomas indicate positive associations between APOBEC mutation signature enrichment scores and mRNA levels for Ung2, AP endonuclease 1 (Apex1), and X-ray repair cross-complementing protein 1 (Xrcc1) but not for Rev1 (Figures 5G–5J). Here, APEX1 is linked to lymphoma.