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Results 1 - 2 of 2 for Protoporphyrin IX
  1. ... the product of the sixth step) to form protoporphyrin IX. In the final step, another enzyme modifies protoporphyrin IX by inserting an iron atom to produce heme. ...
  2. ... iron atom is inserted into the center of protoporphyrin IX (the product of the seventh step) to form ...