sentence: Dynamic mass exclusion windows were set at 2 min and all of the spectra were measured with an overall mass / charge ( m / z ) ratio range of 300 – 1700 Th.Tandem mass spectra were used to search a database of all human RefSeq proteins downloaded directly from the National Center for Biotechnology Institute ( NCBI ; 27MAR07 ) and a decoy database using TurboSEQUEST ( Bioworks Browser 3.2 ; ThermoElectron ) .