Hi Kiran,<br><br><div class="gmail_quote"><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div><div style="color:#000;background-color:#fff;font-family:times new roman, new york, times, serif;font-size:12pt">
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<div class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal;text-autospace:none"><font face="Times" size="4"><span style="font-size:14px"> Yes!
Indeed, Refmac (in Buccaneer) automatically calculates twin operators and
fractions.<u></u><u></u></span></font></div>

<div class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal;text-autospace:none"><span><font face="Times" size="4"><span style="font-size:14px">But these
values are slightly different from those calculated from Xtriage  (Though
twin operators are equivalent twin fractions is different).</span></font></span></div></div></div></div></blockquote><div><br></div><div><br></div><div>phenix.xtriage estimates the twin fraction, while phenix.refine (and I&#39;m pretty sure Refmac too) refine it. That explains the difference you observe.</div>
<div><br></div><div>Pavel</div><div><br></div></div><br>