heme
See also: hème
English
Etymology
Back-formation from hemoglobin.
Noun
heme (countable and uncountable, plural hemes)
- (biochemistry) The component of hemoglobin (and other hemoproteins) responsible for binding oxygen. It consists of an iron ion that binds oxygen and a porphyrin ring that binds the globin molecules; one molecule binds one molecule of oxygen.
- 2008, John Greer, John Foerster, George Rodgers, Fixos Paraskevas, Bertil Glader, Daniel Arber, Robert Means Jr, Wintrobe's Clinical Hematology: Volume One: Twelfth Edition, page 141:
- The binding of oxygen to the iron molecule causes the hemoglobin molecule to undergo conformational changes that affect the binding of oxygen to other heme sites.
- 2018, Ruth Reichl, Silvia Killingsworth, The Best American Food Writing 2018, Mariner Books, →ISBN, page 152:
- Impossible's breakthrough was in discovering that meat's essence comes from heme—the iron-rich molecule in blood that carries oxygen and is responsible for the deep-red color.
- 2008, John Greer, John Foerster, George Rodgers, Fixos Paraskevas, Bertil Glader, Daniel Arber, Robert Means Jr, Wintrobe's Clinical Hematology: Volume One: Twelfth Edition, page 141:
Related terms
Translations
See also
Middle English
Etymology 1
Inherited from Old English -hǣme, related to hām (“home; village, community”). This etymology is incomplete. You can help Wiktionary by elaborating on the origins of this term.
Descendants
- English: heme
References
- “hēme, n.”, in MED Online, Ann Arbor, Mich.: University of Michigan, 2007.
Etymology 2
From Old English ġehēme. This etymology is incomplete. You can help Wiktionary by elaborating on the origins of this term.
Descendants
- English: heme
References
- “hẹ̄me, adj.”, in MED Online, Ann Arbor, Mich.: University of Michigan, 2007.
Norwegian Nynorsk
Pronunciation
- IPA(key): /²heːmə/
Adverb
heme
- (dialectal, nonstandard) alternative form of heime (“at home”)
- 1949, Alf Prøysen, Dørstokken heme [The Doorstep at Home], Høvik, page 14:
- Og andre gongen han vakner ligg han heme.
- And the other time he wakes, he's at home.
Spanish
Pronunciation
- IPA(key): /ˈeme/ [ˈe.me]
- Rhymes: -eme
- Syllabification: he‧me
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