Search engines for MS ProteinInfo    ProteinInfo allows you to find protein sequences from databases of amino acid or cDNA sequences. It contains additional tools that allow you to find disulphide bonds, perform BLAST searches and calculate proteolytic cleavage patterns (and more). ProFound    ProFound is a search engine that takes a peptide mass map obtained from a spectrum and compares it to a database of sequences. Using a proved Bayesian algorithm, it finds the protein sequences that best match the data.    Try PeptideMap for detailed comparison of data and sequences. Sonar ms/ms    Sonar ms/ms compares MS/MS spectra with sequence databases. It is based on a vector transformation of spectra and sequences that is particularly well suited to performing fast, accurate protein identifications.