The structure.ent file contains only the alpha carbon positions obtained from the protein structure using the command: grep ATOM [pdbfile] | grep " CA " > structure.ent Structure.ent represents the protein as a set of nodes, one per residue. This is converted to an elastic network Hessian matrix (matrix.sdijf) using the pdbmat function of Elnemo as per the pdbmat.dat file, placing springs between all nodes lying with 10 Angstroms of each other. The matrix is diagonalised using the diagstd function of Elnemo to produce the materix.eigenfacs file. The first six modes are trivial rigid body motions. The first ten nontrivial modes (7 to 16) have been extracted for visualisation and use in simulations. Each numbered mode[NN].in file lists the PDB entry number of a CA atom followed by its displacement vector in the given mode. These .in files are used to guide geometric simulations of flexible motion. Each matching mode[NN].pdb file is a multi-model PDB file showing the nodes being linearly displaced along the mode eigenvector. Each such file contains 11 MODEL entries, of which MODEL 6 is the original set of modes. These PDB files are for quick review/visualisation of the normal modes of the protein.