Hello everyone,

I have two data sets, one  for apo form and the other is co-crystalized with ligandl. Both data sets has P1211 space group; resolution is about ~3.5Angstrom.
Unit cell:
Apo:     105.22, 266.26, 110.63       90.00, 108.12, 90.00
Ligand: 104.60, 264.74, 109.98,      90.00, 106.33, 90.00  

When I try to create an isomorphous difference map using phenix GUI, an error message pops up: crystal symmetry mismatch between different files.
Anyone could tell me what's the problem and how to solve it? 
 
======================
Jason
Structural Biology Department
University of Pittsburgh
======================