Examples of heme in the following topics:
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- Cytochrome proteins have a prosthetic heme group.
- The heme molecule is similar to the heme in hemoglobin, but it carries electrons, not oxygen.
- The heme molecules in the cytochromes have slightly different characteristics due to the effects of the different proteins binding them, which makes each complex.
- This complex contains two heme groups (one in each of the cytochromes a and a3) and three copper ions (a pair of CuA and one CuB in cytochrome a3).
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- Each subunit surrounds a central heme group that contains iron and binds one oxygen molecule, allowing each hemoglobin molecule to bind four oxygen molecules.
- Molecules with more oxygen bound to the heme groups are brighter red.
- Hemoglobin is made up of four symmetrical subunits and four heme groups.
- Iron associated with the heme binds oxygen.
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- Despite the name, hemerythrin does not contain a heme group; its oxygen-carrying capacity is poor compared to hemoglobin.
- Hemoglobin is composed of four protein subunits, two alpha chains and two beta chains, and a heme group that has iron associated with it.
- Like hemoglobin, hemerythrin is carried in blood cells and has iron associated with it, but despite its name, hemerythrin does not contain heme.
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- For instance, the blood protein hemogobin is made up of four polypeptide chains, each of which also contains a heme molecule, which is ring structure with an iron atom in its center.
- The proteins' α and β subunits are in red and blue, and the iron-containing heme groups in green.