For the GPL please see the COPYING file in the main PDB2PQR directory.
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PROPKA USER LICENSE AGREEMENT

PropKa: a program for protein pKa predictions 
Copyright (C) 2005 Jan H. Jensen and Hui Li
 
This program is free software; you can redistribute it and/or modify 
it under the terms of the GNU General Public License as published by 
the Free Software Foundation; either version 2 of the License, or 
(at your option) any later version.
 
This program is distributed in the hope that it will be useful,  but 
WITHOUT ANY WARRANTY; without even the implied warranty of 
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the  GNU 
General Public License for more details.
 
You should have received a copy of the GNU General Public License 
along with this program; if not, write to the Free Software 
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 
USA
 
For questions or comments contact Jan-Jensen@uiowa.edu

