Gallop P M, Paz M A, Flückiger R, Kagan H M
Trends Biochem Sci. 1989 Aug;14(8):343-6. doi: 10.1016/0968-0004(89)90169-2.
The recently discovered redox coenzyme, PQQ (methoxatin), is widely distributed. Quantitation of protein-bound PQQ has been difficult, but unique redox cycling reactions, which reflect its striking biological properties, reveal trace amounts. PQQ is a potential target for drugs.