Disabling virtual sites

[freakyacorn]

Is it possible to disable the production of virtual sites when generating a .itp file for a protein sequence?

[fgrunewald]

Technically speaking you can use an old ff-file. However, the VS is an integral part of the new model as it facilitates the water scaling. If you decide to change the water BB interactions instead be aware that this might effect other molecules in your system. Thus we strongly recommend to not do this.