Dear Peter,

Shameless plug: you could do worse than to read the report of the X-ray Validation Task Force of the wwPDB (http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3195755/), which includes citations to the original literature such as the Engh & Huber studies on bond lengths and angles, and their standard deviations.

Best wishes,

Randy Read

-----
Randy J. Read
Department of Haematology, University of Cambridge
Cambridge Institute for Medical Research    Tel: +44 1223 336500
Wellcome Trust/MRC Building                         Fax: +44 1223 336827
Hills Road                                                            E-mail: [log in to unmask]
Cambridge CB2 0XY, U.K.                               www-structmed.cimr.cam.ac.uk

On 29 Jan 2013, at 20:47, Peter Randolph wrote:

> My advisor has told me that an acceptable range for publication is an RMSD for bonds ~ 0.01 A and angles >2.0 degrees is acceptable for publication (with a proper R and R-free). Does anyone know where these values came from and if there a specific citation to go along with it?
> Thanks,
> Peter
>