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Porphyrin
PORPHYRIN

Definition: Any of a group of naturally occurring complex heterocyclic compounds that play an important role in the respiratory processes of plants and animals. They are found (e.g. in chlorophyll or in the nonprotein portion of hemoglobin) usually in combination with metal ions (e.g. magnesium or iron).
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See perfect characteristic (1).

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See perfect porphyria.

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