RESIDUE   ABU     16
CONECT      N      3 CD   H    H2  
CONECT      CD     4 N    CB   HA1  HA2 
CONECT      CB     4 CD   CG   HB1  HB2 
CONECT      CG     4 CB   C    HG1  HG2 
CONECT      C      3 CG   O    OXT 
CONECT      O      1 C   
CONECT      OXT    2 C    HXT 
CONECT      H      1 N   
CONECT      H2     1 N   
CONECT      HA1    1 CD  
CONECT      HA2    1 CD  
CONECT      HB1    1 CB  
CONECT      HB2    1 CB  
CONECT      HG1    1 CG  
CONECT      HG2    1 CG  
CONECT      HXT    1 OXT 
END   
HET    ABU             16
HETSYN     ABU GAMMA(AMINO)-BUTYRIC ACID
HETNAM     ABU GAMMA-AMINO-BUTANOIC ACID
FORMUL      ABU    C4 H9 N O2