where the equilibrium constant of the left pathway: K, is emphasized instead. The superior kinetics of the PCET between PtsH, α-tocopherol, and O2 •-(Figure )) demonstrate the CV (type A) without the negative-shift of Epc. So the negative shift is caused by the HB of the three OHs. After forming O2-RsvH3, the initial cathodic scan forming O2 •--RsvH3 followed by PCET occurs as an intra-complex reaction. Thus, these CV results demonstrate that multiple OHs (3OH, 5OH, and 4'OH) of RsvH3 are related not only to the formation of O2-RsvH3 as an extensive HB network but also to the initial reduction of O2-RsvH3/O2 •--RsvH3 (O2/O2 •-) and the subsequent PCET.