Hi Winston,

The failure to open a MTZ file properly via the File/Open GUI is my fault, and something I'll be remedying with the next release of ISOLDE/Clipper. For now, you can do it at the command line using "open filename.mtz structureModel #{model id}", or via the "Load crystallographic dataset" button on ISOLDE's GUI.

Best regards,

Tristan

From: ChimeraX-users <chimerax-users-bounces@cgl.ucsf.edu> on behalf of Wen-Jin Winston Wu via ChimeraX-users <chimerax-users@cgl.ucsf.edu>
Sent: 22 June 2021 17:14
To: chimerax-users@cgl.ucsf.edu <chimerax-users@cgl.ucsf.edu>
Subject: [chimerax-users] Open a PDB-formatted file and a MTZ file

Hi,

I am trying to inspect electron density of X-ray data.

I have the PDB-formatted coordinate file a.pdb (not been submitted to PDB yet) and a mtz file (a.mtz).

I have downloaded Clipper to Chimera X (1.2.5) running on Window 10.

I have opened my a.pdb, and I then tried to open my a.mtz file from the File-Open and I specified the file type with “*.mtz”, and opened the a.mtz file, but I then got the error message: “Must specify a structure model to associate with crystallographic data”.

I know that I was not doing it correctly (e.g. not typing proper commands with correct syntax.). I looked into the description in the URL below. However, I just could not get it work. Any help will be appreciated. Thanks!

http://rbvi.ucsf.edu/chimerax/docs/user/commands/open.html#clipper

Best wishes,

Winston