Abstract:We show that DNA methylation is a layered process in B lymphocytes. An underlying foundational methylome is stably established during B lineage commitment and overlaid with a DNMT3A-maintained dynamic methylome which is sculpted in distinct ways in B1 and B2 B cells during B cell development. An engineered loss of DNMT3A after commitment to the B lineage unmasks a foundational methylome that is shared in both B1 and B2 sub-lineages. The dynamic methylome is comprised of novel enhancers whose methylation state … Show more
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