Cctbx.prime

Prime: post-refinement and merging

Step-by-step guidelines to post-refine and merge XFEL diffraction images. For more detail and citation, see Enabling X-ray free electron laser crystallography for challenging biological systems from a limited number of crystals "DOI: http://dx.doi.org/10.7554/eLife.05421"

Step 1: Generating input file

Like most programs developed under cctbx framework, prime reads in input .phil file, which stores all the parameters needed to run post-refinement and merging steps. To generate the template .phil file, do the dry run by calling

$ prime.postrefine

An example of the template .phil file:

data = None
run_no = None
title = None
averaging_engine = both *python cpp
icering {
  flag_on = False
  d_upper = 3.9
  d_lower = 3.85
}
scale {
  d_min = 0.1
  d_max = 99
  sigma_min = 1.5
}
...

You can se the content of the output here and save it to any file name - in this tutorial, let's save it to thermolysin.phil.