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    <blockquote
      cite="mid:18de3fe1.19f91.14de5e23c4a.Coremail.smith_liu123@163.com"
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      <div
        style="line-height:1.7;color:#000000;font-size:14px;font-family:Arial">After
        fitting a PDB into a 3.5-5 A resolution EM map by
        phenix.real_space_refine, should I still need to do a reciprocal
        space refine?</div>
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    Why?<br>
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    <blockquote
      cite="mid:18de3fe1.19f91.14de5e23c4a.Coremail.smith_liu123@163.com"
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        <div>For crystallography, the reciprocal space is in fact not
          purely imaginary, </div>
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    Indeed!<br>
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    <blockquote
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        <div>But for the EM data refinement, what is the reciprocal
          space refine? </div>
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    If you imagine cryo-EM data to be in reciprocal space you can do
    reciprocal space refinement then. This may work given you know why
    you do this.<br>
    <br>
    Pavel<br>
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