To whom it may concern,

My name is Tram Danh, a student researcher under the Radiology Department at UCI. I have encountered problems as I tried to run AutoDock Vina for a structure with At (Astatine). The system said that the atom At was not assigned or recognized. 

I was told by an AutoDock member that At was not in the database so I would need to derive the parameter for At myself. I followed instructions, downloaded the default parameter file, and added At into that file. My current problem is that I am unable to save it in the "C:\Program Files\Chimera 1.14\bin\Lib\site-packages\AutoDockTools" without administrator's permission. I've attached the picture below for your reference.

Thank you for your assistance! I hope to hear from you soon!

Sincerely,

Tram Danh