
Recombinant MLL4 Complex gel MLL4 Complex was run on an 10% SDS-PAGE gel and stained with Coomassie blue.

Recombinant MLL4 Complex HTRF activity assay 3. 3 μM H3K4me0 (1-21aa) peptide was incubated with MLL4 Complex in reaction buffer for 3 hour at room temperature. MLL4 Complex was used in a HTRF assay to determine enzyme linearity. Methylated peptide (H3K4me2) was measured using H3K4me2-specific antibody.

Recombinant MLL4 Complex MALDI-TOF activity assay 3. 3 uM H3K4me0 peptide was incubated with 20 nM MLL4 Complex in reaction buffer for 3 hours at room temperature. The reaction product was detected by MALDI-TOF. Single 3. 3 uM H3K4me0 peptide was used as negative control. Catalytic Ability: 50 turnovers/ enzyme molecule