Protein Informatics Group, Life Sciences Division, Oak Ridge National Laboratory, MS 6480, Oak Ridge, TN 27831-6480, USA. xyn@ornl.gov|Protein Informatics Group, Life Sciences Division, Oak Ridge National Laboratory, MS 6480, Oak Ridge, TN 27831-6480, USA. xyn@ornl.gov|Protein Informatics Group, Life Sciences Division, Oak Ridge National Laboratory, MS 6480, Oak Ridge, TN 27831-6480, USA. xyn@ornl.gov