dihydroisopentenyldehydrorhodopin + A = isopentenyldehydrorhodopin + AH2
dihydroisopentenyldehydrorhodopin + a = isopentenyldehydrorhodopin + ah2
dihydroisopentenyldehydrorhodopin + A = isopentenyldehydrorhodopin + AH2
dihydroisopentenyldehydrorhodopin + a = isopentenyldehydrorhodopin + ah2