label: N(6),N(6)-dimethyl-L-lysyl(4)-[histone H3] + A + H2O = N(6)-methyl-L-lysyl(4)-[histone H3] + formaldehyde + AH2
label_lc: n(6),n(6)-dimethyl-l-lysyl(4)-[histone h3] + a + h2o = n(6)-methyl-l-lysyl(4)-[histone h3] + formaldehyde + ah2