
Ostensibly, all you need to do is run phenix.fmodel with scattering_table=electron . And perhaps try to come up with what k_sol should be for the bulk solvent density. There are caveats, of course, not the least of which is that, last I checked, the modified scattering from formal charges like ions vs neutral groups is not implemented. I don't actually know of a program that handles things like charges. I've heard rumors that someone was working on full QM calculations of electrons moving through matter to try and get this "right", but I have not heard about any progress for some time. Sorry can't be more helpful, -James On 4/2/2025 4:52 AM, Ricardo Righetto wrote:
Hi,
Apologies if I'm missing something obvious, but I was not able to find this in the documentation: is there a PHENIX tool for simulating Coulomb potential maps (aka "cryo-EM maps") from atomic models?
I'm looking for something like the molmap https://www.cgl.ucsf.edu/chimerax/docs/user/commands/molmap.html command in ChimeraX, but more accurate. One such alternative is the simulate program from cisTEM, but I figured PHENIX might also have something?
Thank you!
-- Ricardo Diogo Righetto
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