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  2. Heme - Wikipedia

    en.wikipedia.org/wiki/Heme

    The heme iron serves as a source or sink of electrons during electron transfer or redox chemistry. In peroxidase reactions, the porphyrin molecule also serves as an electron source, being able to delocalize radical electrons in the conjugated ring. In the transportation or detection of diatomic gases, the gas binds to the heme iron.

  3. Non-heme iron protein - Wikipedia

    en.wikipedia.org/wiki/Non-heme_iron_protein

    Some non-heme iron proteins contain one Fe at their active sites, others have pairs of Fe centers: Many mono-Fe proteins are alpha-ketoglutarate-dependent hydroxylases . Major examples are the lipoxygenases , isopenicillin N synthase , protocatechuate 3,4-dioxygenase , deacetoxycephalosporin-C synthase , [ 1 ] and aromatic amino acid hydroxylases .

  4. Iron-binding proteins - Wikipedia

    en.wikipedia.org/wiki/Iron-binding_proteins

    Iron-binding proteins are carrier proteins and metalloproteins that are important in iron metabolism [1] and the immune response. [2] [3] Iron is required for life.Iron-dependent enzymes catalyze a variety of biochemical reactions and can be divided into three broad classes depending on the structure of their active site: non-heme mono-iron, non-heme diiron , or heme centers. [4]

  5. Hemoglobin - Wikipedia

    en.wikipedia.org/wiki/Hemoglobin

    Uses copper prosthetic groups instead of iron heme groups and is blue in color when oxygenated. Hemerythrin Some marine invertebrates and a few species of annelid use this iron-containing non-heme protein to carry oxygen in their blood. Appears pink/violet when oxygenated, clear when not. Chlorocruorin

  6. Human iron metabolism - Wikipedia

    en.wikipedia.org/wiki/Human_iron_metabolism

    Absorption of dietary iron in iron salt form (as in most supplements) varies somewhat according to the body's need for iron, and is usually between 10% and 20% of iron intake. Absorption of iron from animal products, and some plant products, is in the form of heme iron, and is more efficient, allowing absorption of from 15% to 35% of intake.

  7. Hemoprotein - Wikipedia

    en.wikipedia.org/wiki/Hemoprotein

    The serum iron pool maintains iron in soluble form, making it more accessible for cells. [3] Oxygen (O 2), nitric oxide (NO), carbon monoxide (CO) and hydrogen sulfide (H 2 S) bind to the iron atom in heme proteins. Once bound to the prosthetic heme groups, these molecules can modulate the activity/function of those hemeproteins, affording ...

  8. Pork vs. beef: Which is healthier? Dietitians reveal 3 ... - AOL

    www.aol.com/pork-vs-beef-healthier-dietitians...

    Dietitians reveal 3 nutrition differences. A. Pawlowski. January 29, 2025 at 9:53 PM ... Pork is a good source of protein, vitamin B12 and thiamin, and minerals — particularly heme iron, ...

  9. Trace metal - Wikipedia

    en.wikipedia.org/wiki/Trace_metal

    Roughly 5 grams of iron are present in the human body and is the most abundant trace metal. [1] It is absorbed in the intestine as heme or non-heme iron depending on the food source. Heme iron is derived from the digestion of hemoproteins in meat. [4] Non-heme iron is mainly derived from plants and exist as iron(II) or iron(III) ions. [4]