Canadian Medical Guide > Chemicals and Drugs > Amino Acids, Peptides, and Proteins > Proteins > Blood Proteins > Hemoglobins Terms and Definitions

Hemoglobins

Medical Definition:	The oxygen-carrying pigments of erythrocytes. They are found in all vertebrates and some invertebrates. The structure of the globin moiety differs between species.
Guide Notes:	GEN or unspecified; prefer specifics; /anal: permitted & do not equate with HEMOGLOBINOMETRY; "mean cell erythrocyte hemoglobin" = ERYTHROCYTE INDICES; Bohr effect is indexed OXYHEMOGLOBINS /metab (IM) + PH (NIM)
Also Called:	Eryhem,Ferrous Hemoglobin,Hemoglobin Level

Hemoglobins Categories.

	Carboxyhemoglobin
	Erythrocruorins - High molecular weight (1,500,000 to 3,000,000) hemoglobins found in the plasma of many polychete and oligochete annelid worms and various mollusks. They bind one mole of oxygen per heme and function as oxygen carriers.
	Fetal Hemoglobin - The major component of hemoglobin in the fetus. This HEMOGLOBIN has two alpha and two gamma polypeptide subunits in comparison to normal adult hemoglobin, which has two alpha and two beta polypeptide subunits. Fetal hemoglobin concentrations can be elevated (usually above 0.5%) in children and adults affected by LEUKEMIA and several types of ANEMIA.
	Globins - The protein constituents of hemoglobin.The term is used for proteins attached to iron-porphyrin molecules such as hemoglobin and MYOGLOBIN proteins.
	Hemoglobin A - Normal adult human hemoglobin. The globin moiety consists of two alpha and two beta chains.
	Hemoglobins, Abnormal - Hemoglobins characterized by structural alterations within the molecule. The alteration can be either absence, addition or substitution of one or more amino acids in the globin part of the molecule at selected positions in the polypeptide chains.
	Methemoglobin
	Oxyhemoglobins - A compound formed by the combination of hemoglobin and oxygen. It is a complex in which the oxygen is bound directly to the iron without causing a change from the ferrous to the ferric state.
	Sulfhemoglobin

Hemoglobins Medical Definitions and Terms

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