The signs of the phases will depend on the permutation order of the axes. Maybe when you created the map you inadvertently reversed the hand? What do you see if you run mapdump on the map?
Cheers -- Ian On 15 October 2014 01:53, Steven Chou <stevezc...@gmail.com> wrote: > Dear All, > > I used 'sftools (in CCP4)' to convert a map (in CCP4 format) to structure > factors (.mtz). > However the phases were flipped. I back converted it into a map file and > compared it with the original one. The back converted one was just the > mirror of the original one. To get the right phase, I had to convert the > structure factors to a text format (CIF or XPLOR) and edit it with script. > Their relationship is: CorrectPhase = 360 - phaseFromSftools. > > I also used CNS to do the same conversion. The phases from CNS were > correct. > > sftools > > set spacegroup > > P1 > > set cell > > 200 200 200 90.000 90.000 90.000 > > mapin input.map MAP > > map2sf resol 3 column F_prot PHI_prot > > write output.mtz > > exit > > Was sftoold designed in this way? > > Thanks! > Steven > > > -- > Steven Chou > > >
