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== Discussions about isolevel discrepancy between PyMOL and Coot ==
* https://www.jiscmail.ac.uk/cgi-bin/webadmin?A1=ind1506&L=COOT&D=0#3
* https://www.jiscmail.ac.uk/cgi-bin/webadmin?A1=ind1506&L=ccp4bb&D=0#16
== PyMOL normalizes across the data grid in the ccp4 file, not across the unit cell. Better options might be: ==
* normalize across the unit cell
* not to normalize at all (change the default of '''normalize_ccp4_maps''' to '''off''')
* normalize based on AMEAN and ARMS reported in the ccp4 map header