6-demethylmitomycin B + S-adenosyl-L-methionine <=> mitomycin B + S-adenosyl-L-homocysteine
6-demethylmitomycin b + s-adenosyl-l-methionine <=> mitomycin b + s-adenosyl-l-homocysteine
6-demethylmitomycin B + S-adenosyl-L-methionine <=> mitomycin B + S-adenosyl-L-homocysteine
6-demethylmitomycin b + s-adenosyl-l-methionine <=> mitomycin b + s-adenosyl-l-homocysteine