| 1. | Two molecules of this intermediate become linked to form porphobilinogen.
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| 2. | Porphobilinogen deaminase is involved in the third step of the heme biosynthetic pathway.
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| 3. | Porphobilinogen deaminase usually exists in dimer units in the cytoplasm of the cell.
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| 4. | An inhibitor of porphobilinogen synthase with this mechanism of action has been documented.
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| 5. | The colorless porphobilinogen is changed to the dark colored porphobilin due to oxygen exposure.
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| 6. | Hereditary insufficiency of porphobilinogen synthase is called porphobilinogen synthase ( or ALA dehydratase ) deficiency poprhyria.
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| 7. | Hereditary insufficiency of porphobilinogen synthase is called porphobilinogen synthase ( or ALA dehydratase ) deficiency poprhyria.
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| 8. | The porphobilinogen synthase catalyzed reaction is the first common step in the biosynthesis of all biological tetrapyrroles.
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| 9. | PBG is then converted into hydroxymethyl bilane by the enzyme porphobilinogen deaminase, also known as hydroxymethylbilane synthase.
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| 10. | All natural tetrapyrroles, including hemes, chlorophylls and vitamin B 12, share porphobilinogen as a common precursor.
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