Hi John--

> I'm looking to set up a structural calculation that involves a
> phosphorylated peptide. Does anyone have experience working with
> Phos-Ser + Phos-Thr in XPLOR? If so, any guidance on how to properly
> incoporate the atoms + charge into the calculation would be
> appreciated. 

There's an example of phosphorylating SER in
eginput/PSF_generation/genModCircPep.py in the Xplor-NIH
distribution. For threonine, a patch needs to be created following
presidue SP in toppar/protein.top. If you have trouble with this,
please follow up with me.

best regards--
Charles


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