From: Atreyo Pal (
Date: Mon Nov 09 2020 - 11:33:51 CST

Hi everyone,
Does anyone please know how to use the "cionize plugin" for VMD (on MacOS)?
I need to neutralize a siRNA molecule and I'm really confused about finding
it. I've tried:

package require cionize
> 1.0
cionize -p 4 -i -f Molecules/siRNA.pdb
> invalid command name "cionize"