Top chemical compounds for concept: c_0331
# Observed top chemical compounds associated with the concept c_0331
#  mined from the 'HETATM' record lines within the wwPDB
#  coordinate files of this concept's usages. 
#   -------------------------------------------------------------c_0331
#   %Freq     Ligand/Chemical Compound
#   ------------------------------------------------------------------- 
    98.8     334 HEM PROTOPORPHYRIN IX CONTAINING FE
    24.0      81 CMO CARBON MONOXIDE
    15.4      52 OXY OXYGEN MOLECULE
    13.0      44 SO4 SULFATE ION
     8.6      29 ACE ACETYL GROUP
     6.8      23 HNI PROTOPORPHYRIN IX CONTAINING NI(II)
     4.7      16 PO4 PHOSPHATE ION
     4.1      14 2FU BUT-2-ENEDIAL
     3.0      10 MBN TOLUENE
     3.0      10 GOL GLYCEROL
     2.1       7 NO NITRIC OXIDE
     1.8       6 CYN CYANIDE ION
     1.2       4 RQ3 2-{4-[(3,5-DIMETHYLANILINO)-CARBONYL-METHYL]-PHENOXY}-2-METHYLPROPIONIC ACID
     1.2       4 NO2 NITRITE ION
     1.2       4 IHP INOSITOL HEXAKISPHOSPHATE
     1.2       4 DG2 2,3-DIPHOSPHOGLYCERIC ACID
#   ------------------------------------------------------------------- 
#   Notes: %Freq gives (as a percentage) the number of usages
#      of the concept in which the associated Chemical Compund or
#      Ligand was observed in the HETATM record.
#   -------------------------------------------------------------c_0331