T stability archea membrane ether linked isoprene

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Unformatted text preview: ESTER LINKAGES. T STABILITY Archea membrane: ether-linked isoprene ARCHAEBACTERIA PHOSPHOLIPIDS, THEY ARE ETHER LINKAGES, R GROUPS ARE ISOPRENE UNITS, MONOMER WITH METHYL GROUP HANGING OFF EVERY OTHER CARBON. INSIDE, LONG HYDROPHOBIC AREA INSIDE AND OUTSIDE ARE COVALENTLY LINKED, ADVANTAGEOUS FOR ORGANISMS THAT MUST LIVE IN HIGH HEAT AND HIGH ACID ENVMT. Archea membrane: glycerol diether & tetraether OUTSIDE Cell structure/function: RNA polymerases: BACTERIA RNA POLYM. HAVE A SPECIFIC ORDER OF SUBUNITS, ARCHAEBACTERIA DO NOT HAVE THIS Bacteria: a, b, b’, and one s factor/ratio of 2:1:1:1 Archea: highly variable among archaebacteria//often eight or 10 polypeptides Protein synthesis: Ribosomes: 70s ribosomes Initiation of translation: PROTEIN SYNTHESIS: HAVE 70S RIBOSOMES LIKE EUBACTERIA, START CODON FOR BACTERIA HAVE A FORMYL-METHIONINE AS START CODON, EUKARYA/ARCHAEBACTERIA JUST START WITH METHIONINE. Bacteria: Start codon (AUG) initiates translation with formylmethionine (a modified methionine) Archaebacteria and eukarya: Start codon (AUG) initiates translation with unmodified methionine Antibiotics (e.g....
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