label: (2E)-geranyl diphosphate + S-adenosyl-L-methionine => (E)-2-methylgeranyl diphosphate + S-adenosyl-L-homocysteine + H(+)
label_lc: (2e)-geranyl diphosphate + s-adenosyl-l-methionine => (e)-2-methylgeranyl diphosphate + s-adenosyl-l-homocysteine + h(+)