Whoops, I misspoke... I meant Rsym and Rmerge increase with higher redundancies.
------------------------------------------------------------------------------- Greg Costakes PhD Candidate Department of Structural Biology Purdue University Hockmeyer Hall, Room 320 240 S. Martin Jischke Drive, West Lafayette, IN 47907 -------------------------------------------------------------------------------- ** Hard work often pays of in time, but Procrastination always pays off now ** ----- Original Message ----- From: "Dale Tronrud" <det...@uoxray.uoregon.edu> To: "Greg Costakes" <gcost...@purdue.edu> Cc: CCP4BB@JISCMAIL.AC.UK Sent: Tuesday, January 24, 2012 12:43:43 PM Subject: Re: [ccp4bb] Problem with getting Rfree and Rf down Is this observation about redundancies a general rule that I missed? It seems rather surprising to me. What have results have others seen? Dale Tronrud On 01/24/12 07:23, Greg Costakes wrote: > snip... > Higher redundancies (>7 or so) do tend to increase overall R/Rfree. > snip... > ------------------------------------------------------------------------------- > > Greg Costakes > PhD Candidate > Department of Structural Biology > Purdue University > Hockmeyer Hall, Room 320 > 240 S. Martin Jischke Drive, West Lafayette, IN 47907 > > -------------------------------------------------------------------------------- > > ** Hard work often pays of in time, but Procrastination always pays off > now ** > > ------------------------------------------------------------------------ > *From: *"Sam Arnosti" <meisam.nosr...@gmail.com> > *To: *CCP4BB@JISCMAIL.AC.UK > *Sent: *Monday, January 23, 2012 4:48:50 PM > *Subject: *[ccp4bb] Problem with getting Rfree and Rf down > > Hi every one > > I have some crystals in the space group P3121. I collect 180 frames of data. > > My crystals do not diffract better than at most 2.0 angstrom, but the Rf > barely goes below 23%, > > and Rfree also remains somewhere between 28-33%. I have tried to refine > my data as much as I can. > > I do not know whether the problem is because of the bad diffraction or > collecting extra frames. > > The structure factors are also high but they get better as the crystals > diffract better. > > Thanks > > Sam
