Immunogen sequence: KDARKGPLVP FPNQKSEAAE PPKTPPSSCD STNAAIAKQA LKKPIKGKQA PRKKAQGKTQ QNRKLTDFYP VRRSSRKSKA ELQSEERKRI DELIESGK. SETD8 is a histone methyltransferase that specifically monomethylates 'Lys-20' of histone H4. H4 'Lys-20' monomethylation is