MODRES 3DEH OCS A  163  CYS  CYSTEINESULFONIC ACID                              
MODRES 3DEH OCS B  163  CYS  CYSTEINESULFONIC ACID                              
MODRES 3DEH OCS C  163  CYS  CYSTEINESULFONIC ACID                              
MODRES 3DEH OCS D  163  CYS  CYSTEINESULFONIC ACID