[Chimera-users] box cut out is not a cube!

[Dieter Blaas]

Dear all and Elaine,

       I have an mrc volume of 450 x 450 x 450 px, put a marker at a 
particular location and cut out a box with 'Box around selected atoms 
with padding 60'. However, Chimera shows me the boxed volume as 124 x 
123 x 124. I understand that the higher value must result from the voxel 
size being 0.97 A/px, so the dimensions would be 123.71 x 123.71 x 
123.71 or anything similarly rounded. BUT why are the dimensions in 
x,y,z different and the box not exactly cubic? I noticed that it might 
have to do with centering but I do not understand how I can cut out a 
'really' cubic box!

Thanks for help, best, Dieter

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Dieter Blaas,
Max F. Perutz Laboratories
Medical University of Vienna,
Inst. Med. Biochem., Vienna Biocenter (VBC),
Dr. Bohr Gasse 9/3,
A-1030 Vienna, Austria,
Tel: 0043 1 4277 61630,
Fax: 0043 1 4277 9616,
e-mail: dieter.blaas at meduniwien.ac.at
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