Hi All. Me again! LOL I am sure this has come up and related to how the "B-factor" in the refined PDB's ADP column is calculated including the overall anisotropic B-factor, etc but is it unusual to have isotropic ADPs refine to 0.00? I have several nice structures with 0.00 isotropic ADPs. I am not refining TLS or anisotropic ADPs at all. Just the normal course of refinement. These are regions of a high degree of order and the maps are beautiful but just wandering what the 0.00 ultimately means particularly when I eventually submit to the Protein Data Bank. Joe P.S. Nat's tips on COOT and Phenix are working beautifully now! Thanks Nat! ___________________________________________________________ Joseph P. Noel, Ph.D. Investigator, Howard Hughes Medical Institute Professor, The Jack H. Skirball Center for Chemical Biology and Proteomics The Salk Institute for Biological Studies 10010 North Torrey Pines Road La Jolla, CA 92037 USA Phone: (858) 453-4100 extension 1442 Cell: (858) 349-4700 Fax: (858) 597-0855 E-mail: [email protected] Web Site (Salk): http://www.salk.edu/faculty/faculty_details.php?id=37 Web Site (HHMI): http://hhmi.org/research/investigators/noel.html ___________________________________________________________