Heme
Heme, or haem (pronounced /hi:m/ HEEM), is a precursor to hemoglobin, which is necessary to bind oxygen in the circulatory system. Heme is biosynthesized in both the bone marrow and the liver.
Function
Hemes can do many things, such as catalyse reactions or move chemicals. Hemes are usually bound to proteins, which makes what are called hemoproteins.
Examples of hemoproteins include hemoglobin, myoglobin, leghemoglobin, and cytochrome.
Related pages
Types of tetrapyrroles |
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Bilanes (Linear) |
- Bilirubin
- Biliverdin
- Stercobilinogen
- Stercobilin
- Urobilinogen
- Urobilin
| Phytobilins | | Phycobilins |
- Phycoerythrobilin
- Phycocyanobilin
- Phycourobilin
- Phycoviolobilin
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Macrocycle | Corrinoids |
- Adenosylcobalamin
- Cyanocobalamin
- Methylcobalamin
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Porphyrins | Protoporphyrins |
- Heme (b, c, a, o)
- Magnesium protoporphyrin
- Protoporphyrin IX
- Pterobilin
- Zinc protoporphyrin
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Phytoporphyrins |
- Chlorophyll c
- Protochlorophyllide
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Reduced porphyrins | Porphyrinogens |
- Uroporphyrinogen (I, III)
- Coproporphyrinogen (I, III)
- Protoporphyrinogen IX
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Chlorins |
- Chlorophyllide (a, b)
- Chlorophyll (a, b)
- Pheophytin (a, b)
- Bacteriochlorophyll c
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Bacteriochlorins | |
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Isobacteriochlorins |
- Siroheme
- Sirohydrochlorin
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Corphins | |
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