This directory contains a PDB sample for each base-pair described in the Leontis-Westhof classification.
The name of each file precises the type of interaction described.
Inside each file, the name of the molecule has been modified ("1" or "2") to easily map the partner of the interaction.
For example, if the file name is GCHSA (meaning a Cis-Hoogsteen-SugarEdge interaction between a G and an A), then the molecule "1" describes the first residue in the filename (here the "G" using its Hoogsteen edge) and the molecule "2" the second one (here the "A" using its Sugar edge). 

The "recenterBasePairs.groovy" script is a util script to recenter on the [0,0,0] point the original base-pairs extracted from resolved 3D structures. Launch it in this directiry using this command: "./recenterBasePairs.groovy"