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Strange Fo-Fc map

Jack Tanner chemjjt at SHOWME.MISSOURI.EDU
Wed Dec 3 11:02:23 EST 1997

At which contour level are you seeing this strange feature?

>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!

Dr. John J. Tanner
University of Missouri - Columbia
Chemistry Dept.
123 Chemistry Bldg.
Columbia, MO 65211

phone:  573-884-1280
fax:    573-882-2754
chemjjt at showme.missouri.edu

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