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Hemoglobin: Difference between revisions
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== Types == | == Types == | ||
Hemoglobin variants are abnormal forms of hemoglobin. Since hemoglobin is made up of heme, an iron-containing portion, and globin, which forms a protein, the molecules are found in all red blood cells. The molecules bind oxygen in the lungs and carry it throughout the body to release it to the body’s tissues. | |||
In the embryo: | |||
* Gower 1 (ξ2ε2) | |||
* Gower 2 (α2ε2) (PDB 1A9W) | |||
* Haemoglobin Portland (ξ2γ2) | |||
In the fetus: | |||
* Haemoglobin F (α2γ2) (PDB 1FDH) | |||
In adults: | |||
* Haemoglobin A (α2β2) (PDB 1BZ0) - The most common type. (95%-98%) It includes two alpha (α) protein chains and two beta (β) protein chains | |||
* Haemaglobin A2 (α2δ2) - It has two alpha (α) and two delta (δ) protein chains. It makes up about 2%-3% of Hb. | |||
* Haemoglobin F (α2γ2) - It has two alpha (α) and two gamma (γ) protein chains. In adults, Haemoglobin F is found only in red cells called F cells. | |||
== Role in disease == | == Role in disease == | ||
