Hi Sam: You need to index in P222 and find out the axis that does not have systematic absence (not screwed) in P21212, then rationalize yourself how to switch this axis to c while keeping the same handness.
But since you already know the correct index a = 96.54 b = 121.95 c = 75.33 and yours a' = 75.03 b' = 96.50 c' = 121.98. i.e. a=b', b=c', c=a'. There is a button called "reindex" at the bottom of the scalepack page in HKL2000. Only two possibilities for P21212 -- takes 10s to try both. Weikai On Mon, February 19, 2007 2:15 pm, U Sam wrote: > Hi > I crystallized a protein in different condition than reported before and > structure had been already reported by other group. In both cases space > group is P21 21 2 Right now I am not interested in solving the structure, > but to look for some other properties. I see a difference in cell dimension > as follows. Reported structure > a = 96.54 b = 121.95 c = 75.33 > > For my crystal > a = 75.03 b = 96.50 c = 121.98 > > This the cell dimensions are ~equal in lengths but are associated with > different axis compare to the reported crysta structure. I used HKL2000 > for indexing. I would like to know why the above difference in cell > dimensions. Is there any way I can index my data which would give cell > parameters of reported structure? thanks in advance for any > suggestion/comments. sam > > _________________________________________________________________ > Find a local pizza place, movie theater, and moreĀ .then map the best > route! http://maps.live.com/?icid=hmtag1&FORM=MGAC01 > >
