How do I convert zwitterions to neutral form in Avogadro?

I'd like to be able to convert zwitterions to neutral form in Avogadro if possible. How do I do this? 




I don't think the neutral protomer of an amino acid can be generated in Avogadro. What *can* be done is adjusting the protonation state for different values of pH. That option is in the **Build** menu - **Build**-> **Add Hydrogens for pH**.


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