2.2 SQUARE inside PROTEIN p0 inside PROTEIN p1 inside PROTEIN p2 inside PROTEIN p3 inside PROTEIN p4 inside PROTEIN p5 inside PROTEIN p6 inside PROTEIN p7 inside PROTEIN p8 inside SIMPLE_MOLECULE Protoporphyrinogen_space_IX inside SIMPLE_MOLECULE Uroporphyrinogen_space_III inside SIMPLE_MOLECULE Coproporphyrinogen_space_III inside SIMPLE_MOLECULE Protoporphyrin inside SIMPLE_MOLECULE Coproporphyrinogen_space_I inside SIMPLE_MOLECULE Hydroxymethylbilane inside SIMPLE_MOLECULE Heme inside SIMPLE_MOLECULE Iron inside SIMPLE_MOLECULE _space_5_minus_Aminolevulinate inside RNA L_minus_Glutamyl_minus_tRNA_space_Glu_space_ inside SIMPLE_MOLECULE Porphobilinogen inside SIMPLE_MOLECULE L_minus_Glutamate inside SIMPLE_MOLECULE _space_S_space__minus_4_minus_Amino_minus_5_minus_oxopentanoate inside SIMPLE_MOLECULE Uroporphyrinogen_space_I STATE_TRANSITION Protoporphyrin Heme c3 c7 c6 STATE_TRANSITION Uroporphyrinogen_space_I Coproporphyrinogen_space_I c13 c4 STATE_TRANSITION L_minus_Glutamyl_minus_tRNA_space_Glu_space_ _space_S_space__minus_4_minus_Amino_minus_5_minus_oxopentanoate c9 c12 STATE_TRANSITION _space_5_minus_Aminolevulinate Porphobilinogen c8 c10 STATE_TRANSITION Porphobilinogen Hydroxymethylbilane c10 c5 STATE_TRANSITION _space_S_space__minus_4_minus_Amino_minus_5_minus_oxopentanoate _space_5_minus_Aminolevulinate c12 c8 STATE_TRANSITION Coproporphyrinogen_space_III Protoporphyrinogen_space_IX c2 c0 STATE_TRANSITION Protoporphyrinogen_space_IX Protoporphyrin c0 c3 STATE_TRANSITION Uroporphyrinogen_space_III Coproporphyrinogen_space_III c1 c2 STATE_TRANSITION L_minus_Glutamate L_minus_Glutamyl_minus_tRNA_space_Glu_space_ c11 c9