label: N(5)-methyl-L-glutaminyl-[histone H2A] + S-adenosyl-L-homocysteine + H(+) => L-glutaminyl-[histone H2A] + S-adenosyl-L-methionine
label_lc: n(5)-methyl-l-glutaminyl-[histone h2a] + s-adenosyl-l-homocysteine + h(+) => l-glutaminyl-[histone h2a] + s-adenosyl-l-methionine