Metmyoglobin

Metmyoglobin is the oxidised form of the oxygen-carrying protein myoglobin. Metmyoglobin is the cause of the characteristic brown colouration of meat that occurs as it ages.

In living muscle, the concentration of metmyoglobin is vanishingly small, due to the presence of the enzyme metmyoglobin reductase, which, in the presence of the cofactor NADH and the coenzyme cytochrome b4 converts the Fe³⁺ in the heme prosthetic group of metmyoglobin back to the Fe²⁺ of normal myoglobin. In meat, which is dead muscle, the normal processes of removing metmyoglobin are prevented from effecting this repair, or alternatively the rate of metmyoglobin formation exceeds their capacity, so that there is a net accumulation of metmyoglobin as the meat ages.

External links

• MeSH Metmyoglobin

This protein-related article is a stub. You can help Wikipedia by expanding it.v · Categories: Hemoproteins Protein stubs Wikimedia Foundation. 2010. Игры ⚽ Нужно сделать НИР? Jimmy Nicol Béla I of Hungary Look at other dictionaries: Metmyoglobin — (MbFe(III)) ist die oxidierte Form des sauerstofftragenden Proteins Myoglobin (MbFe(II)). Es entsteht durch Autoxidation im Körper von Wirbeltieren. Metmyoglobin ist die Ursache der charakteristischen braun grauen Verfärbungen von totem Fleisch,… …   Deutsch Wikipedia metmyoglobin — noun The oxidized form of myoglobin …   Wiktionary metmyoglobin — Myoglobin in which the ferrous ion of the heme prosthetic group is oxidized to ferric ion; ferrimyoglobin. * * * met·myo·glo·bin met mī ə .glō bən n a reddish brown crystalline pigment that is formed by oxidation of myoglobin * * *… …   Medical dictionary metmyoglobin — met·myoglobin …   English syllables metmyoglobin — (|)met+ noun Etymology: meta + myoglobin : a reddish brown crystalline pigment that is formed by oxidation of myoglobin …   Useful english dictionary MetMb — • metmyoglobin …   Dictionary of medical acronyms & abbreviations Myoglobin — Model of helical domains in myoglobin.[1] …   Wikipedia Speisesalz — Salzminerale im Schauglas …   Deutsch Wikipedia meat processing — Introduction       preparation of meat for human consumption.       Meat is the common term used to describe the edible portion of animal tissues and any processed or manufactured products prepared from these tissues. Meats are often classified… …   Universalium metMb — Abbreviation for metmyoglobin. * * * metmyoglobin …   Medical dictionary 18+ © Academic, 2000-2024 Contact us: Technical Support, Advertising Dictionaries export, created on PHP, Joomla, Drupal, WordPress, MODx. Mark and share Search through all dictionaries Translate… Search Internet Share the article and excerpts Direct link … Do a right-click on the link above and select “Copy Link”