The SQT file contains matching information between MS/MS spectra and a sequence database. See more information at McDonald, W.H. et al. “MS1, MS2, and SQT-three unified, compact, and easily parsed file formats for the storage of shotgun proteomic spectra and identifications.” Rapid Communications in Mass Spectrometry. 18, 2162-2168 (2004). Users can download sqt files at the search result page. Click a download button. IP2 will process sqt files so that they can be downloaded.