MODRES 2QZO CME A  381  CYS  S,S-(2-HYDROXYETHYL)THIOCYSTEINE                   
MODRES 2QZO CME B  381  CYS  S,S-(2-HYDROXYETHYL)THIOCYSTEINE                   
MODRES 2QZO CME B  530  CYS  S,S-(2-HYDROXYETHYL)THIOCYSTEINE