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Strange Fo-Fc map

Vesa Tuominen O_GOLD Vesa.Tuominen at btk.utu.fi
Wed Dec 3 08:50:56 EST 1997


I have strange Fo-Fc map, where are several parallel + and - density
lines. The resolution of our data is about 2.1 and we have solved
structure to about 2.1. R is about 19 % and Rfree 24 %. Everything looks
good exept our Fo-Fc map.
I have calculated Fo-Fc map several times sometimes excluding the
highest or the lowest resolution reflections. I have also tried
calculations by excluding reflections which have the biggest differences
between fobs and fcalc, but everytime my Fo-Fc map looks almost exactly
to same. So have anybody any idea what could be wrong?

Thank you!


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