* list_PDB.csv: This file lists the PDB identifiers along with the type of ligand co-crystallized with each Bcl-xL chain (Apo, SM, P, or pP).
* alignedPosition_description.xls: This file describes the positions aligned across the dataset and includes the following information:
    - Aligned positions: Position number in the multiple sequence alignment.
    - PDB positions (3ZK6_A): Corresponding residue number in the reference structure 3ZK6_A.
    - neqSL: The neqSL value in the full Bcl-xL dataset.
    - neqSL_apo: The neqSL value in the subset of apo structures.
    - POCKET: Indicates whether the position belongs to the common binding pocket (POCKET = 1) or not (POCKET = 0).
    - HELICES: Indicates whether the position is part of one of the eight α-helices (HELICES = 1) or not (HELICES = 0).
    - Bnorm: Normalized average B-factor value.
    - Bnorm_binaire: Binary flexibility classification — Flexible (Bnorm > 0) or Rigid (Bnorm ≤ 0).
