There are two ProBiS web pages out there: ProBiS at
http://probis.cmm.ki.si
maintained at the National Institute of Chemistry, Slovenia, and ProBiS-CHARMMing at
https://probis.nih.gov
situated at the National Institutes of Health, USA. Why is that? ProBiS-CHARMMing has additional functions
only available from inside NIH: it enables energy minimization
of predicted protein-ligand complexes and their interaction energy calculation.