Electrospray Ionization Mass Spectrometry Studies on

Peptide libraries have been broadly recognized as useful sources for screening bioactive ligands that bind to receptors and enzymes, as powerful tools for studying antibody-antigen interactions, and for searching detailed information about protein-protein interactions etc. Also, this approach has been widely used by the drug industry to discover biologically active compounds. Existing methods for constructing peptide libraries include multipin synthesis, tea-bag method, split synthesis, and light-directed combinatorial library construction.