Definition of heme in English:

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heme

Pronunciation: /hēm/
(British haem)

noun

Biochemistry
An iron-containing compound of the porphyrin class that forms the nonprotein part of hemoglobin and some other biological molecules.
Example sentences
  • This turnover releases significant amounts of the iron-free portion of heme, porphyrin, which is subsequently degraded.
  • The majority of photosensitizers are derivatives of hematoporphyrin, a synthetic porphyrin synthesized from heme.
  • The active site or prosthetic group of all the cytochromes is an iron containing porphyrin, or heme.

Origin

1920s: back-formation from hemoglobin.

For editors and proofreaders

Syllabification: heme

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