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  2. Heme - Wikipedia

    en.wikipedia.org/wiki/Heme

    Heme D is the site for oxygen reduction to water of many types of bacteria at low oxygen tension. [24] Heme S is related to heme B by having a formyl group at position 2 in place of the 2-vinyl group. Heme S is found in the hemoglobin of a few species of marine worms.

  3. Human iron metabolism - Wikipedia

    en.wikipedia.org/wiki/Human_iron_metabolism

    Iron is present in the iron–sulfur cluster and heme groups of the electron transport chain proteins that generate a proton gradient that allows ATP synthase to synthesize ATP (chemiosmosis). Heme groups are part of hemoglobin, a protein found in red blood cells that serves to transport oxygen from the lungs to other tissues.

  4. Iron in biology - Wikipedia

    en.wikipedia.org/wiki/Iron_in_biology

    Heme iron in animals is from blood and heme-containing proteins in meat and mitochondria, whereas in plants, heme iron is present in mitochondria in all cells that use oxygen for respiration. Like most mineral nutrients, the majority of the iron absorbed from digested food or supplements is absorbed in the duodenum by enterocytes of the ...

  5. Hemoglobin - Wikipedia

    en.wikipedia.org/wiki/Hemoglobin

    Found in many annelids, including earthworms, it is a giant free-floating blood protein containing many dozens—possibly hundreds—of iron- and heme-bearing protein subunits bound together into a single protein complex with a molecular mass greater than 3.5 million daltons.

  6. Hemosiderin - Wikipedia

    en.wikipedia.org/wiki/Hemosiderin

    Hemosiderin or haemosiderin is an iron-storage complex that is composed of partially digested ferritin and lysosomes. The breakdown of heme gives rise to biliverdin and iron. [1] [2] The body then traps the released iron and stores it as hemosiderin in tissues. [3] Hemosiderin is also generated from the abnormal metabolic pathway of ferritin. [3]

  7. Steak has many nutrients, but here's why you should avoid ...

    www.aol.com/steak-many-nutrients-heres-why...

    Steak is also a good source of vitamin B12, "which is crucial for energy levels, brain health, and red blood cell production," says Alex Larson, a registered dietitian, endurance athlete ...

  8. 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]

  9. 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 ...