N(6)-methyl-L-lysyl(20)-[histone H4] + 2-oxoglutarate + O2 <=> L-lysyl(20)-[histone H4] + formaldehyde + succinate + CO2
n(6)-methyl-l-lysyl(20)-[histone h4] + 2-oxoglutarate + o2 <=> l-lysyl(20)-[histone h4] + formaldehyde + succinate + co2