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    <p>Hi Laurie,</p>
    <p>as others suggested please try the same refinement using the
      latest version of Phenix. If that does not help please send me all
      inputs off list and I will investigate.</p>
    <p>Pavel<br>
    </p>
    <div class="moz-cite-prefix">On 3/18/22 13:11, Mark Saper wrote:<br>
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      cite="mid:BA9F8D8E-0B66-4EEE-A9A4-510EB1FE3567@umich.edu">
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      Laurie,
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      <div class="">Really bizarre.  The experts will have more info, I
        hope.  When you model the Tyr in the posiive density, is the
        geometry satisfactory (including main-chain)?  If so, then you
        might try turning off real space refinement and see what
        happens.  Check the occupancies of the Tyr also.</div>
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      <div class="">-Mark</div>
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            <div>_____________________<br class="">
              <b class=""><font class="" color="#011993">Mark A. Saper,
                  Ph.D.</font></b><br class="">
              <span style="font-style: normal; font-size: 12px;"
                class="">Associate Professor Emeritus of Biological
                Chemistry<br class="">
                University of Michigan Medical School<br class="">
                <a href="mailto:saper@umich.edu"
                  class="moz-txt-link-freetext" moz-do-not-send="true">saper@umich.edu</a> 
                |  +1 734 276 6505</span><br class="">
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