haem


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heme

(hēm)
1. The porphyrin chelate of iron in which the iron is Fe(II) (Fe2+); the oxygen-carrying, color-furnishing, prosthetic group of hemoglobin.
2. Iron complexed with nonporphyrins but related tetrapyrrole structures (e.g., biliverdin heme).
Synonym(s): reduced hematin, haem.
[G. haima, blood]

haem

or

heme

a ring-like chemical structure containing an atom of ferrous iron that is bound as a PROSTHETIC GROUP to each POLYPEPTIDE CHAIN within HAEMOGLOBIN and MYOGLOBIN, giving blood and muscle their characteristic red colour.

haem

iron-containing, oxygen-carrying, red-coloured constituent of haemoglobin

heme

(hēm)
1. The oxygen-carrying, color-furnishing, prosthetic group of hemoglobin.
2. Iron complexed with nonporphyrins but related tetrapyrrole structures.
Synonym(s): reduced hematin, haem.
[G. haima, blood]

haem

see heme.
References in periodicals archive ?
When the diet of iron-depleted infants was examined, compared with those who were iron replete, the intake of haem iron was found to be significantly lower and there was a tendency for lower intakes of total iron and vitamin C, indicating a diet of low iron bioavailability.
Although most haem in the body is used in the production of haemoglobin, approximately 20% is used to form a component of enzymes, including cytochrome P450 enzymes that are responsible for metabolising a wide range of drugs and metabolites [Badminton and Elder, 2002].
Suffering from a rare blood disease known as porphyria, Raven's blood lacks a key ingredient called haem.
The type of iron found in meat is known as haem iron, which is the same as the iron found in the blood and is therefore easy to absorb into the body.
On the other hand, species of origin determinations are problematic, under the methods described by Tuross, Newman and other workers; in many cases they may provide no additional useful information beyond that obtained from simple assays for Haem or Immunoglobulins.
Chapter 3 Iron metabolism, iron deficiency and disorders of the haem synthesis (A.
Both feature a red pigment called haem that can irritate or damage the cells in the bowel then divide and this increases the chances of one of the cells changing into a ticking cancer time bomb.
Stress protein-induced immunosuppression: inhibition of cellular immune effector functions following overexpression of haem oxygenase (HSP 32).
Calcium was also found to be an inhibitor of both haem and non-haem iron.
It is made by enzymes breaking down the red haem molecule (found in haemoglobin in red blood cells) into green biliverdin and yellow bilirubin molecules.
Evidence that haem iron in the malaria parasite is not needed for the antimalarial effects of artemisinin.
DDS is an oxidising agent which overrides the body's innate protective mechanisms and causes an abnormal proportion of iron in the haem moiety of haemoglobin to be oxidised to the ferric state ([Fe.