L-lysyl(4)-[histone H3] + 2 S-adenosyl-L-methionine => N(6),N(6)-dimethyl-L-lysyl(4)-[histone H3] + 2 S-adenosyl-L-homocysteine + 2 H(+)
l-lysyl(4)-[histone h3] + 2 s-adenosyl-l-methionine => n(6),n(6)-dimethyl-l-lysyl(4)-[histone h3] + 2 s-adenosyl-l-homocysteine + 2 h(+)
L-lysyl(4)-[histone H3] + 2 S-adenosyl-L-methionine => N(6),N(6)-dimethyl-L-lysyl(4)-[histone H3] + 2 S-adenosyl-L-homocysteine + 2 H(+)
l-lysyl(4)-[histone h3] + 2 s-adenosyl-l-methionine => n(6),n(6)-dimethyl-l-lysyl(4)-[histone h3] + 2 s-adenosyl-l-homocysteine + 2 h(+)