What is hemoglobin?

  • (noun): A hemoprotein composed of globin and heme that gives red blood cells their characteristic color; function primarily to transport oxygen from the lungs to the body tissues.
    Example: "Fish have simpler hemoglobin than mammals"
    Synonyms: haemoglobin, Hb

Hemoglobin

Hemoglobin ( /hiːməˈɡloʊbɪn/; also spelled haemoglobin and abbreviated Hb or Hgb) is the iron-containing oxygen-transport metalloprotein in the red blood cells of all vertebrates (with the exception of the fish family Channichthyidae) as well as the tissues of some invertebrates. Hemoglobin in the blood carries oxygen from the respiratory organs (lungs or gills) to the rest of the body (i.e. the tissues) where it releases the oxygen to burn nutrients to provide energy to power the functions of the organism, and collects the resultant carbon dioxide to bring it back to the respiratory organs to be dispensed from the organism.

Read more about Hemoglobin.

Some articles on hemoglobin:

Sickle Cell Anemia, A Molecular Disease - Caltech Work
... mid-1930s, Pauling turned his attention to the physical and chemical nature of hemoglobin ... previously trained as a physician) the task of finding differences in hemoglobin that might explain sickle cell disease ... Itano also found that the globin portion of sickle cell hemoglobin had a barely detectable difference in electrical charge ...
Hemoglobin, Alpha 2 - Function
... HbA, which in normal adult life comprises about 97% of the total hemoglobin alpha chains combine with delta chains to constitute HbA-2, which with HbF (fetal hemoglobin) makes up the ...
Hemoglobin E
... Hemoglobin E or haemoglobin E (HbE) is an abnormal hemoglobin with a single point mutation in the β chain ... Hemoglobin E has been one of the less well known variants of normal hemoglobin ... Also, this hemoglobin variant has a weak union between α and β globin, causing instability when there is a high amount of oxidant ...
Laboratory Of Molecular Biology - Early Beginnings: 1947-61
... Here, in the Cavendish laboratory, he started his lifelong work on hemoglobin ... joined Perutz’s group to study a protein closely related to hemoglobin — myoglobin — in 1946 ... structures of proteins, such as myoglobin and hemoglobin could, in principle, be solved by X-ray analysis using a heavy metal atom labeling technique ...
Sulfhemoglobinemia
... The pigment is a greenish derivative of hemoglobin which cannot be converted back to normal, functional hemoglobin ... It is a rare blood condition that occurs when a sulfur atom is incorporated into the hemoglobin molecule ...