Definitions for heme
himheme

Princeton's WordNetRate this definition:0.0 / 0 votes

1. heme, haem, hematin, haemitin, protohemenoun

   a complex red organic pigment containing iron and other atoms to which oxygen binds

WiktionaryRate this definition:0.0 / 0 votes

1. hemenoun

   The component of hemoglobin responsible for binding oxygen, consists of an iron ion that binds oxygen and a porphyrin ring that binds the globin molecules; one molecule binds one molecule of oxygen.

WikipediaRate this definition:0.0 / 0 votes

1. Heme

   Heme, or haem (pronounced /hi:m/ HEEM), is a precursor to hemoglobin, which is necessary to bind oxygen in the bloodstream. Heme is biosynthesized in both the bone marrow and the liver.In biochemical terms, heme is a coordination complex "consisting of an iron ion coordinated to a porphyrin acting as a tetradentate ligand, and to one or two axial ligands." The definition is loose, and many depictions omit the axial ligands. Among the metalloporphyrins deployed by metalloproteins as prosthetic groups, heme is one of the most widely used and defines a family of proteins known as hemoproteins. Hemes are most commonly recognized as components of hemoglobin, the red pigment in blood, but are also found in a number of other biologically important hemoproteins such as myoglobin, cytochromes, catalases, heme peroxidase, and endothelial nitric oxide synthase.The word haem is derived from Greek αἷμα haima meaning "blood".

WikidataRate this definition:5.0 / 1 vote

1. Heme

   A haem or heme is a chemical compound of a type known as a prosthetic group consisting of an iron ion contained in the centre of a large heterocyclic organic ring called a porphyrin, made up of four pyrrolic groups joined together by methine bridges. Not all porphyrins contain iron, but a substantial fraction of porphyrin-containing metalloproteins have heme as their prosthetic group; these are known as hemoproteins. Hemes are most commonly recognized in their presence as components of hemoglobin, the red pigment in blood, but they are also components of a number of other hemo-proteins such as myoglobin, cytochrome, endothelial nitric oxide synthase, catalase, etc.

U.S. National Library of MedicineRate this definition:0.0 / 0 votes

1. Heme

   The color-furnishing portion of hemoglobin. It is found free in tissues and as the prosthetic group in many hemeproteins.

Suggested ResourcesRate this definition:0.0 / 0 votes

1. HEME

   What does HEME stand for? -- Explore the various meanings for the HEME acronym on the Abbreviations.com website.

Matched Categories

1. • Pigment

How to pronounce heme?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say heme in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of heme in Chaldean Numerology is: 1

2. Pythagorean Numerology

   The numerical value of heme in Pythagorean Numerology is: 4

Examples of heme in a Sentence

1. Cynthia Sass:

   Just 2 to 20 percent of the iron in plant foods makes its way from your digestive tract into your blood, compared to 15 to 35 percent from heme animal-based iron.

2. Cynthia Sass:

   Vitamin C gives non-heme iron a sizable boost, upping its absorption by six times, so pair beans with foods like bell peppers, broccoli, tomatoes, and citrus.

Popularity rank by frequency of use

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=heme
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Heme
3. ^ Wikipedia
   https://en.wikipedia.org/wiki/Heme
4. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=heme