Dear all, is there a way to modify the decision constants in phaser_ep? Specifically, I want to refine against heavy-atom derivative with one strong site. The resolution of the data is 3.6A; the substructure (4 sites) was solved at 8A. Upon refinement, phaser finds two more sites at distances of ~3.5A to the strongest site. Furthermore, it finds two holes at distances of ~3.5A to the strongest site. Now I would like phaser to treat the site as anisotropic. However, the distances are beyond its decision constant (~2.54A), so it chooses to add two sites to my HA model, but they refine poorly. How is the decision constant calculated? Can I influence the calculation? I found nothing in the phaser wiki. Alternatively: how can I tell phaser_ep that it should refine a given input atom anisotropically? I tried to add a ANISOU line to the PDB file but the program seems to ignore it. thanks, Kay -- Kay Diederichs http://strucbio.biologie.uni-konstanz.de email: [email protected] Tel +49 7531 88 4049 Fax 3183 Fachbereich Biologie, Universität Konstanz, Box M647, D-78457 Konstanz This e-mail is digitally signed. If your e-mail client does not have the necessary capabilities, just ignore the attached signature "smime.p7s".