Pyrroloquinoline quinone CAS:72909-34-3 Formula C14H6N2O8 These enzymes containing PQQ are called quinoproteins. Glucose dehydrogenase, one of the quinoproteins, is used as a glucose sensor. Subsequently, PQQ was found to stimulate growth in bacteria.In addition, antioxidant and neuroprotective effects were also found. 25KG/DRUMS