Electrochemical oxidation of selenocystine and selenomethionine.
Electrochemical oxidation of selenocystine (SeCys) and selenomethionine (SeMet), on a gold electrode was studied by cyclic voltammetry (CV), rotating disk electrode technique (RDE) and chronocoulometry (CC). In 0.2 mol/L HAc-NaAc (pH=3.90) supporting electrolyte, anodic peak I potential of SeCys and SeMet was 810 mV and 638 mV, respectively, and this electrode process was diffused controlled. The electrochemical oxidation process of SeCys, in which six electron-transfers were involved, yielded selenocystine selenoxide. The electrochemical oxidation process of SeMet, in which two electron-transfers were involved, yielded selemethionine selenoxide.
Bai
Yan
Y
Department of Chemistry, Jinan University, Guangzhou 510632, China. tbaiyan@jnu.edu.cn
Wang
Tingting
T
Liu
Ying
Y
Zheng
Wenjie
W
D003553:Cystine / Q000031:analogs & derivatives* / Q000737:chemistry / Q000378:metabolism; D055664:Electrochemical Techniques; D004566:Electrodes; D004583:Electrons; D006046:Gold / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D016566:Organoselenium Compounds / Q000737:chemistry / Q000378:metabolism*; D010084:Oxidation-Reduction; D012399:Rotation; D012645:Selenomethionine / Q000737:chemistry / Q000378:metabolism*
D016566:Organoselenium Compounds; C009226:selenocystine; D003553:Cystine; D006046:Gold; D012645:Selenomethionine