| methanococcaceae | A family of anaerobic methanococcales whose organisms are motile by means of flagella. These methanogens use carbon dioxide as an electron acceptor. (12 Dec 1998) |
|---|---|
| methanococcales | An order of anaerobic methanogens in the kingdom euryarchaeota. They are pseudosarcina, coccoid or sheathed rod-shaped and catabolise methyl groups. The cell wall is composed of protein. The order includes one family, methanococcaceae. (12 Dec 1998) |
| methanococcus | A genus of anaerobic coccoid methanococcaceae whose organisms are motile by means of polar tufts of flagella. These methanogens are found in salt marshes, marine and estuarine sediments, and the intestinal tract of animals. (12 Dec 1998) |
| methanogen | A methane-producing prokaryote, member of the Archaea. (09 Oct 1997) |
| methanogenesis | The biological production of methane. (09 Oct 1997) |
| methanogens | Common name of organisms requiring completely anaerobic conditions for growth and producing methane gas as a catabolic product. Methanogens are found in the bovine stomach, swamp mud, and other environments in which oxygen is not present. There are four taxonomic orders: methanobacteriales, methanococcales, methanomicrobiales, and methanosarcinales. (12 Dec 1998) |
| methanol | A toxic, colourless, flammable alcohol which is used in some antifreeze and to manufacture formaldehyde. It can cause blindness and other nervous system damage if ingested (09 Oct 1997) |
| methanol fixative | A fixative used with dry blood films, and often incorporated into the stain used. (05 Mar 2000) |
| methanol oxidase | <enzyme> Contains fad and flavin semiquinone; from the yeast hansenula polymorpha Registry number: EC 1.1.99.- (26 Jun 1999) |
| methanol poisoning | Poisoning by ingestion of methanol or wood alcohol. This ingestion leads to a severe metabolic acidosis and can also cause blindness. Liver and kidney damage can result. (27 Sep 1997) |
| methanol-2-mercaptoethanesulfonic acid methyltransferase | <enzyme> Catalyses first reaction in conversion of methanol to methane by methanosarcina barkeri; 24-kD subunit mtac and 49-kD subunit mtab of mt1 corrinoid protein have been sequenced; genbank y08310 Registry number: EC 2.1.1.- Synonym: methanol-coenzyme m methyltransferase, methanol-com methyltransferase, corrinoid protein mt1, mtab gene product, mtac gene product (26 Jun 1999) |
| methanomicrobiaceae | A family of anaerobic methanomicrobiales whose cells are coccoid to straight or slightly curved rods. There are three genera: methanogenium, methanomicrobium, and methanospirillum. (12 Dec 1998) |
| methanomicrobiales | An order of anaerobic, highly specialised methanogens, in the kingdom euryarchaeota. Its organisms are nonmotile or motile, with cells occurring as coccoid bodies, pseudosarcina, or rods. They are widely distributed in nature. (12 Dec 1998) |
| methanosarcina | A genus of anaerobic, irregular spheroid-shaped methanosarcinales whose organisms are nonmotile. Endospores are not formed. These archaea derive energy via formation of methane from acetate, methanol, mono-, di-, and trimethylamine, and possibly, carbon monoxide. Organisms are isolated from freshwater and marine environments. (12 Dec 1998) |
| methanosarcina barkeri | A species of halophilic archaea whose organisms are nonmotile. Habitats include freshwater and marine mud, animal-waste lagoons, and the rumens of ungulates. (12 Dec 1998) |