Described particularly are protein-protein, protein- nucleic acid, nucleic acid-nucleic acid and biomolecule- ligand interactions in the field of molecular recognition or detection of discontinuous or conformational binding sites or epitopes corresponding to a binding molecule. A synthetic molecular library is provided that allows testing for, identification, characterisation or detection of a discontinuous binding site capable of interacting with a binding molecule, the library having been provided with a plurality of molecules, each molecule comprising at least one first segment linked to a second segment, each segment having the capacity of being a potential single part of a discontinuous binding site.
