label: squalene + 2 S-adenosyl-L-methionine <=> 3,22-dimethyl-1,2,23,24-tetradehydro-2,3,22,23-tetrahydrosqualene + 2 S-adenosyl-L-homocysteine + 2 H(+)
label_lc: squalene + 2 s-adenosyl-l-methionine <=> 3,22-dimethyl-1,2,23,24-tetradehydro-2,3,22,23-tetrahydrosqualene + 2 s-adenosyl-l-homocysteine + 2 h(+)