The original Klotho database was at http://www.biocheminfo.org/klotho but is no more.
This listing is that exact listing, from VisMol:
https://dl.opendesktop.org/api/files/download/id/1466641176/142261-VizMol-0.4.tar.gz

Retrieved 10/11/2017 6:15:56 PM by Bob Hanson, St. Olaf College 
