label: N(6),N(6),N(6)-trimethyl-L-lysyl(9)-[histone H3] + 3 S-adenosyl-L-homocysteine + 3 H(+) => L-lysyl(9)-[histone H3] + 3 S-adenosyl-L-methionine
label_lc: n(6),n(6),n(6)-trimethyl-l-lysyl(9)-[histone h3] + 3 s-adenosyl-l-homocysteine + 3 h(+) => l-lysyl(9)-[histone h3] + 3 s-adenosyl-l-methionine