Protoporphyrinogen IX oxidase converts the methylene bridges between the pyrrole rings to methenyl bridges. Resonance of double bonds around the entire great ring, with its resulting stabilization, is now possible: 
Heme and Iron |
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| Protoporphyrinogen IX oxidase converts the methylene bridges between the pyrrole rings to methenyl bridges. Resonance of double bonds around the entire great ring, with its resulting stabilization, is now possible: |
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| Return to Heme Synthesis | |||
