Classes related to the implementation of the FATCAT alignment algorithm, here called jFATCAT. FATCAT reference:

     Yuzhen Ye & Adam Godzik (2003)
    Flexible structure alignment by chaining aligned fragment pairs allowing twists.
    Bioinformatics vol.19 suppl. 2. ii246-ii255.

see also:

      Andreas Prlic; Spencer Bliven; Peter W. Rose; Wolfgang F. Bluhm; Chris Bizon; Adam Godzik; Philip E. Bourne (2010)
    Pre-calculated protein structure alignments at the RCSB PDB website
    Bioinformatics 26: 2983-2985