Hey Emmanuel Typical R-factor for random structure will be above 57% and for initial MR model it will be somewhere between 40-50%. In your case, High R-factor might be due to many reasons.
So check the data for any twining and also again check the Space group. Because sometime you will end up in wrong space group due to twining also. Check for twining using the following server http://nihserver.mbi.ucla.edu/Twinning/ If you really confident on those, then check the MR solution and density map to see is how the model fits the density, that will give you more information. hope this help. cheers VK --- Emmanuel Prata <[EMAIL PROTECTED]> wrote: > Dear all, > > I have a data set of a protein soaked with sacarose, > and the statistic > data is good until the molecular replacement (Rmerge > 0,07 (24%), > I/Sigma 7 (2,7), completness (99,8 (98%)), and > resolution 1,98A. After > this step, I can not get the Rfactor (64%) to drop > (I believe the > spacegroup is correct). > Could anyone give me suggestions? > Thank you in advance, > Emmanuel Prata > Kabaleeswaran Venkataraman Arise, Awake and stop not until goal is Reached - Swami Vivekanand ____________________________________________________________________________________ Need a quick answer? Get one in minutes from people who know. Ask your question on www.Answers.yahoo.com
