The function of ENSG00000124701 (APOBEC2, apolipoprotein B mRNA editing enzyme catalytic subunit 2) is as follows. Probable C to U editing enzyme whose physiological substrate is not yet known. Does not display detectable apoB mRNA editing. Has a low intrinsic cytidine deaminase activity. May play a role in the epigenetic regulation of gene expression through the process of active DNA demethylation. {ECO:0000269|PubMed:17187054, ECO:0000269|PubMed:21496894}.