RESIDUE   B27     18
CONECT      N      3 CA   H    H2  
CONECT      CA     4 N    CB   C    HA  
CONECT      CB     4 CA   CG2  OG1  HB  
CONECT      CG2    4 CB   HG2  HG2A HG2B
CONECT      OG1    2 CB   HOG1
CONECT      SG     2 C    HSG 
CONECT      C      4 CA   SG   HX   HXA 
CONECT      H      1 N   
CONECT      HA     1 CA  
CONECT      HB     1 CB  
CONECT      HOG1   1 OG1 
CONECT      HG2    1 CG2 
CONECT      HG2A   1 CG2 
CONECT      HG2B   1 CG2 
CONECT      HX     1 C   
CONECT      HXA    1 C   
CONECT      H2     1 N   
CONECT      HSG    1 SG  
END   
HET    B27             18
HETSYN     B27 (2R,3S)-3-amino-4-sulfanylbutan-2-ol
HETNAM     B27 (2R,3S) 3-amino-4-mercapto-2-butanol
FORMUL      B27    C4 H11 N O S