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Close relative of methanogen has introns

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  • Pawnfart
    More on Introns/Plasmids: On another bb a poster brought to my attention that Archaeabacterias are NOT bacterias and that introns were just found in
    Message 1 of 702 , Feb 5, 2002
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      More on Introns/Plasmids: <br><br>On another bb a
      poster brought to my attention that Archaeabacterias are
      NOT bacterias and that introns were just found in
      some Archaea, therefore my idea of methanogens as the
      alpha and omega was not substantiated. I think he had
      this kind of paper in mind:
      <br><br><a href=http://www3.oup.co.uk/nar/forpaper/ target=new>http://www3.oup.co.uk/nar/forpaper/</a> <br><br>VOLUME 30 ISSUE 4 <br><br>"RNomics in
      Archaea reveals a further link between splicing of
      archaeal introns and rRNA processing Thean Hock Tang,
      Timofey S. Rozhdestvensky, B�atrice Clouet d'Orval,
      Marie-Line Bortolin, Harald Huber, Bruno Charpentier,
      Christiane Branlant, Jean-Pierre Bachellerie, J�rgen Brosius
      and Alexander H�ttenhofer "<br><br>Here are some
      links. I agree methanogens are archeabacteria and are
      therefore not related to bacteria. However, they share with
      bacteria genetic characteristics such that they generally
      don't have introns.
      <br><br><a href=http://www.sciam.com/0497issue/0497marrsbox4.html target=new>http://www.sciam.com/0497issue/0497marrsbox4.html</a> <br><br>"Archaea Makes Three <br><br>In the
      summer of 1996 a large collaboration of scientists
      deciphered the full sequence of units, or nucleotides, in
      every gene of Methanococcus jannaschii--a
      methane-producing extremophile that thrives at temperatures near 85
      degrees Celsius. The results strikingly confirmed the
      once ridiculed proposal that life consists of three
      major evolutionary lineages, not the two that have been
      routinely described in textbooks (see chart below).
      "<br><br><a href=http://www.ucmp.berkeley.edu/people/brs/biol1a/Lect4.html target=new>http://www.ucmp.berkeley.edu/people/brs/biol1a/Lect4.html</a> <br><br>"III. A. The Archaea have only recently
      been recognized as a group. 2. DNA is structured much
      like bacterial DNA. <br><br>III. D. 1 Ni is required
      "<br><br>Do methanogens have plasmids? No.
      <br><br><a href=http://www.phage.org/biol3045.htm target=new>http://www.phage.org/biol3045.htm</a> <br><br>See 5 b.
      <br><br><a href=http://web1.ebc.uu.se/molev/staff/rolf/archaea.html target=new>http://web1.ebc.uu.se/molev/staff/rolf/archaea.html</a> <br><br>"Archaeal organisms are characterized by
      a fascinating mixture of features from the other
      two domains. In particular, the replication,
      recombination, transcription and translation proteins are
      homologous to those of eukaryotes, despite the fact that the
      archaea are prokaryotes. The archaea also display unique
      features, including distinct rRNA motifs, ether-linked
      membrane lipids, unique cell envelope components, and the
      ability of certain genera to produce methane.
      "<br><br>Comment: <br><br>Old lines and deep lines--mean little
      evolutionary change. And so far no discovery of a more complex
      way to evolve. Why? My answer: If a creature faces no
      selective pressures, its only fight is with itself. Namely,
      which can reproduce faster and more effectively given
      the chemistry for reproduction. Therefore, introns
      slow replication and must go. <br><br>The fact that
      near relatives of the methanogens are not part of Gaia
      and have evolved genetic complexity is not telling,
      because it may simply mean that some of the evolution of
      the Archaeal organisms was away from Gaia where
      selective pressures occurred. <br><br>To me the
      mitochrondia of complex life is interesting because the
      metabolism is chemically connected ultimately to these
      methanogens requiring H2 and CO2. More indirect evidence of
      alpha and omega. It's not SO2 or some other chemical.
      So when you see the Carbon Clubs promoting "sinks"
      of CO2 to greenery, laugh for me--they just don't
      get it. Greenery rots.
    • b1blancer_29501
      On Feb 28th, the Interplanetary Magnetic Field swung to a strong south-pointing orientation. That, coupled with an elevated solar wind speed and density,
      Message 702 of 702 , Mar 1, 2002
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        On Feb 28th, the Interplanetary Magnetic Field
        swung to a strong south-pointing orientation. That,
        coupled with an elevated solar wind speed and density,
        triggered a G-1 class geomagnetic storm. The result was
        some high latitude aurora. See this link for a
        photgraph of aurora observed over Quebec :
        <a href=http://www.spaceweather.com/aurora/images/01mar02/Moussette2.jpg target=new>http://www.spaceweather.com/aurora/images/01mar02/Moussette2.jpg</a> . As of right now, there are 3 sunspot regions,
        namely 9839, 9842, and 9845, that appear to be capable
        of producing M-class flares. Regions 9839 and 9842
        are close to rotating out of view over the western
        limb of the solar disk. Sunspot region 9845, however,
        is close to the sun's central meridian. A rather
        large coronal hole is also approaching the sun's
        central meridian, and coming into an Earth-pointing
        position. High speed colar wind gusts are likely around the
        first of next week.<br><br>The current solar and
        geomagnetic conditions are :<br><br>NOAA sunspot number :
        153<br>SFI : 188<br>A index : 10<br>K index : 1<br><br>Solar
        wind speed : 372.3 km/sec<br>Solar wind density : 4.4
        protons/cc<br>Solar wind pressure : 1.1 nPa<br><br>IMF : 8.4
        nT<br>IMF Orientation : 0.7 nT North<br><br>Conditions for
        the last 24 hours : <br>Solar activity was low. The
        geomagnetic field was quiet to unsettled. Stratwarm Alert
        exists Friday.<br><br>Forecast for the next 24 hours
        :<br>Solar activity will be low to moderate. The geomagnetic
        field will be quiet to unsettled.<br><br>Solar Activity
        Forecast :<br>Solar activity is expected to be low to
        moderate for the next three days. Region 9845 is a
        possible source for isolated M-class
        flares.<br><br>Geomagnetic activity forecast :<br>Geomagnetic field activity
        is expected to be mainly quiet to unsettled, until
        the onset of high speed stream effects from a
        recurrent coronal hole begin to develop by day three of the
        forecast period. Isolated active conditions are
        anticipated thereafter.<br><br>Recent significant solar flare
        activity :<br>None
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