ISYM/2 is the symmetry number used to generate the unique hkl from the
original. If ISYM is odd then it is the symop. If even then the symop is
negated. Thus ISYM = 1 = h,k,l. ISYM = 2 = -h,-k,-l
Symmetry number is order of operators
There is some code in C in the CCP4 library and in C++ in eg A
Hello Phil,
the order of reflections, or the order of operators? How would I reproduce
"Orig." H K L, as VIEWHKL appears to do?
Thank you.
Wolfram
On Fri, Jun 23, 2017 at 1:50 AM, Phil wrote:
> Yes. With the caveat that ISYM refers to the symmetry operators in the
> order they are stored in the
Hi vito,
I don't think you need double labelling. Two (if there is a Met at the N-term
it might be less ordered) or three SeMet should suffice to phase 360 residues.
It was true in the old days that a Se could phase less than a hundred residues,
but if your measurement is good (resolution bette