Dear ALL

i would like to ask in general if there is a suggested certain completeness cutoff for the higher resolution shell.

for example; the following are the values for the 4 higher resolution shells

      Shell Lower Upper Average      Average     Norm. Linear Square

       limit    Angstrom       I    error   stat. Chi**2  R-fac  R-fac  Rmeas   Rpim  CC1/2    CC*  completeness 

                1.53   1.50     2.5     1.2    1.2  0.706  0.680  0.596  0.855     0.510  0.547  0.841        73.6

                1.50   1.47     2.3     1.1    1.0  0.745  0.742  0.629  0.967     0.613  0.468  0.798        55.3

                1.47   1.44     2.0     1.0    1.0  0.725  0.775  0.644  0.000     0.694  0.395  0.752        52.4

                1.44   1.41     1.9     0.8     0.8  0.689  0.946  0.681  0.000     0.883  0.371  0.736       33.9

          All reflections     44.8     2.5     2.3  0.638  0.044  0.029  0.052     0.028

my question in other word if all statistics for the highest resolution shell are reasonable, good I/sigma, R-fac, ........, CC1/2, ..etc but the completeness is just say 20 or 30, what is allowable completeness limit for the highest resolution shell, 70, 80 or 90???

regards

TK_Dawod