H2BC21 and hematopoietic and lymphoid system neoplasm: No differences between the three groups (controls, solid cancers, blood cancers) were detected regarding the expression macroH2A1.1, while H2A/H2B dimer, H2B, H4, macroH2A1.1/H2B, and macroH2A1.2/H2B dimers were detectable only in a few patients (Fig. 2).