In MM, KDM6B regulates the expression of key components of the MAP Kinase pathway in a demethylase-activity-independent manner in order to enhance tumor cell survival, whereas in DLBCL, KDM6B controls BCL6 expression and protein levels in a fashion that requires the demethylase activity in order to facilitate tumor cell proliferation [79,80]. Here, MBD2 is linked to diffuse large B-cell lymphoma.