/mnt/bwpy/single/usr/lib/python3.5/site-packages/simtk/openmm/app/internal/pdbstructure.py:536: UserWarning: WARNING: duplicate atom (ATOM 623 H ALA A 39 15.476 24.940 43.088 1.00 0.00 XP1 H , ATOM 613 H ALA A 39 18.699 26.448 43.024 1.00 0.00 XP1 H )
warnings.warn("WARNING: duplicate atom (%s, %s)" % (atom, old_atom._pdb_string(old_atom.serial_number, atom.alternate_location_indicator)))
warning