intracellular membrane-bounded organelle | catalytic complex | cell | nuclear lumen | MLL1/2 complex | cytoplasm | intracellular organelle | MLL1 complex | histone methyltransferase complex | protein-containing complex | methyltransferase complex | Rix1 complex | nucleoplasm | transferase complex | membrane-bounded organelle | nucleus | organelle | membrane-enclosed lumen | intracellular