Top chemical compounds for concept: c_0604

# Observed top chemical compounds associated with the concept c_0604
#  mined from the 'HETATM' record lines within the wwPDB
#  coordinate files of this concept's usages. 
#   -------------------------------------------------------------c_0604
#   %Freq     Ligand/Chemical Compound
#   ------------------------------------------------------------------- 
   100.0      47 HEM PROTOPORPHYRIN IX CONTAINING FE
    25.5      12 MG MAGNESIUM ION
     8.5       4 CU COPPER (II) ION
     4.3       2 CA CALCIUM ION
     2.1       1 SO4 SULFATE ION
     2.1       1 NA SODIUM ION
     2.1       1 EPE 4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID
     2.1       1 ACT ACETATE ION
#   ------------------------------------------------------------------- 
#   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_0604