Hemeprotein: Definition from Answers.com

A hemeprotein (or hemoprotein or haemoprotein), or heme protein, is a metalloprotein containing a heme prosthetic group, either covalently or noncovalently bound to the protein itself. The iron in the heme is capable of undergoing oxidation and reduction (usually to +2 and +3, though stabilized ferryl [Fe⁺⁴] compounds are well known in the peroxidases).

Roles

Hemoproteins have diverse biological functions including:

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Proteins: hemeproteins

Subunits	Alpha locus on 16: α (HBA1, HBA2) · ζ (HBZ) · θ (HBQ1) · μ (HBM) Beta locus on 11: β (HBB) · δ (HBD) · γ (HBG1, HBG2) · ε (HBE1)

Tetramers	stages of development: HbA (α₂β₂) · HbA2 (α₂δ₂) · HbF/Fetal (α₂γ₂) · HbE Gower 1 (ζ₂ε₂) · HbE Gower 2 (α₂ε₂) pathology: HbH (β₄) · HbS (α₂β^S₂) · HbC (α₂β^C₂)

Compounds	Carboxyhemoglobin · Carbaminohemoglobin · Oxyhemoglobin/Deoxyhemoglobin · Sulfhemoglobin

Other human	Glycosylated hemoglobin · Methemoglobin

Nonhuman	Chlorocruorin · Erythrocruorin

Other

Other

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