Thank you so much, Elaine! On Mon, Jun 26, 2023 at 1:22 PM Elaine Meng <meng@cgl.ucsf.edu> wrote:

Hi Ryan, No, it is not in volts. It's also not something that one could tell from an image per se, but assuming you used ChimeraX to calculate Coulombic electrostatic potential, the units are kcal/(mol·e) at 298 K, as mentioned on this page:

<https://rbvi.ucsf.edu/chimerax/docs/user/commands/coulombic.html>

If you used APBS, DelPhi, or some other method, you should check the documentation for that method to verify what units they produce.

I hope this helps, Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Department of Pharmaceutical Chemistry University of California, San Francisco

...

On Jun 26, 2023, at 12:08 PM, Ryan Gardner via ChimeraX-users < chimerax-users@cgl.ucsf.edu> wrote:

Hello,

I just want to verify that the electrostatic potential is measured in volts (V). Is this correct?

Here's an example of my analysis: <image.png>

Sorry to be a bother!

-Ryan