label: guanosine(10) in tRNA + S-adenosyl-L-methionine => N(2)-methylguanosine(10) in tRNA + S-adenosyl-L-homocysteine + H(+)
label_lc: guanosine(10) in trna + s-adenosyl-l-methionine => n(2)-methylguanosine(10) in trna + s-adenosyl-l-homocysteine + h(+)