I want to test a refinement in which I fix part of my structure (say, residues 1 to 244 in chains C and D, and chains A and B completely) while the rest is to be refined with annealing.
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    I thought atoms out of the selection in the output structure (chains A and B + residues 1 to 244 in chains C and D) would keep the same coordinates as they were input. But I see all structure atoms changed coordinates. I also tried to turn off tls and ncs usage, but the picture is the same.
    What do I miss here, to be able to fix some atoms during refinement?