dihydrobisanhydrobacterioruberin + A <=> bisanhydrobacterioruberin + AH2
dihydrobisanhydrobacterioruberin + a <=> bisanhydrobacterioruberin + ah2
dihydrobisanhydrobacterioruberin + A <=> bisanhydrobacterioruberin + AH2
dihydrobisanhydrobacterioruberin + a <=> bisanhydrobacterioruberin + ah2