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<P><FONT style="BACKGROUND-COLOR: #cbe9cb">Hi Pavel,<BR><BR><A 
onmouseover="javascript:Hear('Thank.wav')">Thank </A><A 
onmouseover="javascript:Hear('you.wav')">you </A><A 
onmouseover="javascript:Hear('for.wav')">for </A><A 
onmouseover="javascript:Hear('responding.wav')">responding </A><A 
onmouseover="javascript:Hear('to.wav')">to </A><A 
onmouseover="javascript:Hear('my.wav')">my </A><A 
onmouseover="javascript:Hear('question.wav')">question </A><A 
onmouseover="javascript:Hear('so.wav')">so </A>eloquently.<BR>But there are 
still something confusing me.<BR>First of all, when I used coot to open the 
"_map_coeffs.mtz", only two maps&nbsp;were displayed in the window,not 
four?<BR>Second, how to choose the maps&nbsp;coefficients? In phenix 
documentation, we konw that any specified coefficients can be set, for example: 
2mFo-DFc, 2.7mFo-1.3DFc, Fo-Fc, 3Fo-2Fc. but it do not tell us why we 
should&nbsp;choose different coefficients.<BR>Thanks a 
lot.<BR><BR>dream830106<BR></FONT></P></BODY></HTML>