myoglobin

The oxygen-carrying and storage protein of muscle, resembling blood hemoglobin in function but containing only one subunit and one heme as part of the molecule (rather than the four of hemoglobin), and with a molecular weight approximately one-quarter that of hemoglobin. SYN: muscle hemoglobin, myohemoglobin. [myo- + hemoglobin]
- carbonmonoxy m. SYN: carboxyhemoglobin.

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myo·glo·bin .mī-ə-'glō-bən, 'mī-ə-. n a red iron-containing protein pigment in muscles that is similar to hemoglobin but differs in the globin portion of its molecule, in the smaller size of its molecule (as in the mammalian heart muscle which has only one fourth the molecular weight of the hemoglobin in the blood of the same animal), in its greater tendency to combine with oxygen, and in its absorption of light at longer wavelengths called also myohemoglobin

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n.

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myo·glo·bin (Mb) (miґo-glo″bin) the oxygen-transporting pigment of muscle, a type of hemoprotein resembling a single subunit of hemoglobin, composed of one globin polypeptide chain and one heme group (containing one iron atom); it combines with oxygen released by erythrocytes, stores it, and transports it to the mitochondria of muscle cells, where it generates energy by combustion of glucose to carbon dioxide and water.

Medical dictionary. 2011.

Look at other dictionaries:

  • Myoglobin — Model of helical domains in myoglobin.[1] …   Wikipedia

  • Myoglobin — Bändermodell von Myoglobin (α Helices) mit Häm (Stäbchenmodell) …   Deutsch Wikipedia

  • myoglobin — myoglobin. См. миоглобин. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • Myoglobin — Myoglobin, in den Muskelzellen vieler Wirbelloser und der Wirbeltiere vorkommendes sauerstoffspeicherndes Chromoprotein; im Gegensatz zu dem verwandten ⇒ Hämoglobin besteht es nur aus einer Peptidkette mit einem Häm, besitzt eine höhere… …   Deutsch wörterbuch der biologie

  • Myoglobin — er det molekyle, som binder ilten ude i musklerne. Det virker som et slags iltlager …   Danske encyklopædi

  • myoglobin — [mī′ō glō΄bin, mī΄ō glō′bin] n. [ MYO + GLOBIN] an iron containing protein in muscle, similar to hemoglobin, that receives oxygen from the red blood cells and transports it to the mitochondria of muscle cells, where the oxygen is used in cellular …   English World dictionary

  • myoglobin — /muy euh gloh bin, muy euh gloh /, n. Biochem. hemoglobin of muscle, weighing less and carrying more oxygen and less carbon monoxide than blood hemoglobin. Also, myohemoglobin /muy euh hee meuh gloh bin, hem euh /. [1920 25; MYO + GLOBIN] * * * ▪ …   Universalium

  • Myoglobin — Myo|glo|bin 〈n. 11; unz.; Med.〉 roter Muskelfarbstoff [<grch. mys, Gen. myos „Muskel“ + Globin] * * * My|o|glo|bin [↑ myo (1) u. ↑ Globin] Symbol: Mb: in der Muskulatur der Säugetiere vorherrschendes u. dort als Sauerstoffspeicher das… …   Universal-Lexikon

  • myoglobin — Protein (17.5 kD) found in red skeletal muscle. The first protein for which the tertiary structure was determined by X ray diffraction, by J.C. Kendrew s group working on sperm whale myoglobin. A single polypeptide chain of 153 amino acids,… …   Dictionary of molecular biology

  • myoglobin — mioglobinas statusas T sritis chemija apibrėžtis Raumenų baltymas, hemoproteinas. atitikmenys: angl. myoglobin rus. миоглобин …   Chemijos terminų aiškinamasis žodynas

  • myoglobin — noun Etymology: International Scientific Vocabulary Date: 1925 a red iron containing protein pigment in muscles that is similar to hemoglobin …   New Collegiate Dictionary

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