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    Hi Kumar,<br>
    <br>
      This can be done using keyboard shortcuts Sc (split connected) and
    mv (measure volume) as shown in the following video demonstration.<br>
    <br>
        <a class="moz-txt-link-freetext" href="http://www.cgl.ucsf.edu/chimera/videodoc/cavity/index.html">http://www.cgl.ucsf.edu/chimera/videodoc/cavity/index.html</a><br>
    <br>
      Tom<br>
    <br>
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      Hi,<br>
      <br>
      I was just wondering if chimera can calculate the volume of a
      central cavity encased inside the cryo-EM density. <br>
      <br>
      Thanjk you,<br>
      Kumar<br>
      <br>
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