The three golden lions on a red background, symbolising England, occupy the first and fourth quarters. The Arms of Scotland, a red lion rearing on its hind legs inside a red border, are in the second quarter, and the Arms of Ireland's golden harp with silver strings on a blue background-are in the third quarter.
Once it is reduced to QH2, ubiquinone delivers its electrons to the next complex in the electron transport chain. Q receives the electrons derived from NADH from complex I and the electrons derived from FADH2 from complex II, including succinate dehydrogenase. This enzyme and FADH2 form a small complex that delivers electrons directly to the electron transport chain, bypassing the first complex.
Energy is stored in the NADH molecule, and when it reacts with oxygen energy is produced in the form of ATP. One NADH molecule leads to the formation of three ATP molecules. Furthermore, NADH creates additional energy when it reacts with oxygen and water forming nicotinamide (also known as vitamin B3) and ADP.