SET domain (including post-SET domain) found in histone-lysine N-methyltransferase 2A (KMT2A), 2B (KMT2B) and similar proteins
This family includes KMT2A and KMT2B. Both KMT2A (also termed ALL-1 or CXXC7 or MLL or MLL1 or TRX1 or HRX) and KMT2B (also termed MLL4 or TRX2) act as histone methyltransferases that methylate 'Lys-4' of histone H3 (H3K4me).