Ved baseline og under behandlingen i kliniske forsøg har man gennem en serie multiple, trinvise regressionsanalyser af genotyper sat 16 aminosyrer i forbindelse med nedsat tipranavir- følsomhed og/ eller nedsat 48- ugers viralt belastningsrespons:
Through a series of multiple stepwise regression analyses of baseline and on-treatment genotypes from all clinical studies, 16 amino acids have been associated with reduced tipranavir susceptibility and/ or reduced 48-week viral load response: