Calculating a simple NCS averaged map

If you already have map coefficients in an MTZ file and have identified your NCS with phenix.find_ncs and just want to calculate the average density in all your NCS copies, you can use phenix.ncs_average. In most cases this can be run automatically by passing the name of the MTZ file and the ncs_spec file with NCS information.

The output of phenix.ncs_average is a CCP4-style map file.

These simple NCS averaged maps can be accurate maps for cases with high NCS symmetry and they are useful for evaluating what an NCS density modified map should be expected to look like.

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