Type of atomic contact: donor hydrogen bond; acceptor hydrogen bond; non-bonded contact (mainly vdw) Atom from the Reference Structure involved in the bond Atom binding to the ref_atom Compound binding to the structure. If ligand is a peptide, it will be one amino acid name Relevant information for the function: binding compound or EC code for catalytic sites PDB code of reference structure used to annotate this residue PDB chain of reference structure used to annotate this residue Residue index of reference structure used in the annotation. In the majority of cases this index is an integer, but sometimes can contain an insertion code. Consequently, this index is unequivocally diferent for each residue in the reference structure Residue name of reference structure used in the annotation Index of the annotated amino acid Name of the annotated amino acid Name of the features WSsas provides annotation for: Ligand (ligand-binding residues); Metal (metal-binding residues); Dna (Nucleic acid-binding residues); Catalytic (catalytic sites); Interaction (amino acids involved in protein-protein interactions) PDB code of structure used in the annotation Percentage of local identity between the annotated sequence and the amino acids sequence of the structure Length of the local alignment as calculated by FASTA Expected value to find the structure by chance in the FASTA search PubMed ID for the key publication on that structure