All missing protons will be added to the structure.
The protons will be placed such that an optimal hydrogen
bonding network will result.
WARNING. When using files with many waters, please be prepared
for a looooong waiting time.
If you have detected any error, or have any question or suggestion,
please send an Email to Gert Vriend.
Roland Krause, Maarten L Hekkelman, Jens E Nielsen,