RESIDUE   MCR      9
CONECT      OXT    2 C    HXT 
CONECT      C      3 OXT  O    CA  
CONECT      O      1 C   
CONECT      CA     4 C    S2   HA   H22 
CONECT      S2     2 CA   HS2 
CONECT      HXT    1 OXT 
CONECT      HA     1 CA  
CONECT      H22    1 CA  
CONECT      HS2    1 S2  
END   
HET    MCR              9
HETSYN     MCR MERCAPTOACETIC ACID
HETNAM     MCR SULFANYLACETIC ACID
FORMUL      MCR    C2 H4 O2 S