well, redundancy for the highest shell is 4.8, I/sigma is 3, Rmerge for overall is 0.08 for highest shell is 0.336. I/sigma and Rmerge don't seem quite nice...
thanks. On Mon, Mar 17, 2008 at 11:51 AM, Partha Chakrabarti <[EMAIL PROTECTED]> wrote: > Hi Melody, > > There was a nice discussion in this year's ccp4 study weekend. In > general, one needs to consider several factors.. If you were at 3A, or > low symmetry, you would of course try to get the maximum out of it, on > the other hand, there are requirements for experimental phasing.. in > general, judge it from: > > 1. Completeness > 2. Redundancy > 3. I / Sigma > 4. R merge statistics > > Not just one of them. If you are pushing it too far, you will see the > effect in later refinement step.. > With 74% completeness, how does the other parameters look like? > > HTH, Partha > > > On Mon, Mar 17, 2008 at 10:06 AM, Melody Lin <[EMAIL PROTECTED]> wrote: > > Hi all, > > > > I have always been wondering... for a data set diffracting to say 2.15 > > Angstrom but in the highest resolution shell (2.25-2.15) the > completeness is > > 74%, should I use merge all the data and call it a 2.15 A dataset or I > > should cut the data set to say 2.25 A where the highest resolution shell > has > > better completeness (>85%)? What is an acceptable completeness value for > the > > highest resolution shell? > > > > Thank you. > > > > Best, > > Melody > > > > > > -- > MRC National Institute for Medical Research > Division of Molecular Structure > The Ridgeway, NW7 1AA, UK > Email: [EMAIL PROTECTED] > Phone: + 44 208 816 2515 >
