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
