Even I have the same problem my crystals get processed in to P212121 as well as P4212 and I am currently analysing the data but not able to conclude the space group. Any idea? Both structure while refining is giving around same R/Rfree. Any help will be appreciable.
Dhaval Patel PhD Student, Bioinformatics & Structural Biology Indian Institute of Advanced Research +91-9925450504 On Thu, May 21, 2015 at 10:57 PM, frazao <fra...@itqb.unl.pt> wrote: > On 05/21/2015 05:23 PM, Keller, Jacob wrote: > >> I can process my 3.8 A dataset in either P4 or P422 point groups. >>>> >>> Do the scaling statistics look similar for both? If so, go with P422. >>> Trying to enforce an incorrect symmetry operator would blow up your >>> stats. >>> >> ...But in the case of twinning, lower space groups can masquerade as >> higher ones. I say try out P4 with twin refinement, see how your stats go. >> >> JPK >> > Or eventually even to further lower symmetry... I had once an example of > true P21212 crystals that processed nicely as P4212, due to a twinning > two-fold axis parallel to the a,b diagonal > > Carlos > > -- > ************************************** > Dr. Carlos Frazao > Structural Biology Laboratory - > Macromolecular Crystallography Unit > ITQB-UNL, Av Republica, Apartado 127 > 2781-901 Oeiras, Portugal > > Phone: (351)-214469666/609 > FAX: (351)-214433644 > e-mail: fra...@itqb.unl.pt > www.itqb.unl.pt >
