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Most are anaerobes most hyperthermophiles use sulfur

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Unformatted text preview: HYPERTHERMOPHILES USE SULFUR AND OXIDIZE IT AS CHEMOAUTOTROPH OR USE IT AS A TERMINAL ELECTRON ACCEPTOR. Most require sulfur: Some use sulfur as an electron acceptor in anaerobic respiration (H2+ S°->H2S + ATP), or as an electron donor (S°->SO4 + ATP). THERMOPLASMA ARE PART OF ARCHAEBACTERIA THAT DO NOT HAVE A CEL WALL, THEY ARE FOUND IN SULFUR FIELDS AND STEAM VENTS. THEY ARE PLEDOMORPHIC, DO HAVE CELL WALL ECT. THEY CAN LIVE DOWN TO PH2 AND HIGH TEMPERATURES. Thermoplasma: Distinctive because no cell wall-->Archea analogue of mycoplasma Small genome 1100 kb pairs/Histone-like proteins Thermoplasma acidophilum (acidophillic/aerobic chemoheterotroph) Coal refuse piles : Opt temp ~55°C/Opt pH ~ 2 Thermoplasma volcanium Solfatara fields worldwide Phenotypically like T. acidophilum, but multiple flagella Acidophilic hyperthermophilic Archaea, the Sulfolobales. (a) Sulfolobus acidocaldarius. Electron micrograph of a thin section. Thomas Brock: Thermus aquaticus ASM News 64: 137 1998 WHEN TAQ IS USED, RNA POLYMERASE FROM THERMUS AQUTICUS IS USED, DNA POLYMERASE Text OF TAQ IS USED TO LIVING AT HIGH TEMPERATURES, ALLOWS ADDITION OF TAQ ENZ ONCE DURING PCR. 18:43 11/25 21:02 CHLORINE MOLECULES ARE CLIPPED OFF...
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