Table I iProphet Search Engine Combinations to Maximize PSM Gains

iProphet PSM Gains (at 1% error) observed by starting with one search engine and adding the best performing 1 to 4 search engines to the combination. Also displayed are the total storage requirements for the resulting data files.

EngineAdditional enginesBest PSM gain at 1% errorBest PSM percent gain (%)Best to addTotal storage size (GB)
InSpecT110,30646.4SEQUEST1.2
Mascot1876138.1SEQUEST0.5
OMSSA1593822.3SEQUEST0.4
X!Tandem1506017.8MyriMatch1.7
MyriMatch1493616.9SEQUEST1.6
SEQUEST1360311.8MyriMatch1.6
InSpecT212,51656.3SEQUEST, MyriMatch2.6
Mascot211,21748.8SEQUEST, MyriMatch1.9
OMSSA2837931.4SEQUEST, MyriMatch1.8
X!Tandem2649022.8SEQUEST, MyriMatch1.9
MyriMatch2580119.8OMSSA, SEQUEST1.8
SEQUEST2446814.6MyriMatch, OMSSA1.8
InSpecT313,35860.1SEQUEST, MyriMatch, X!Tandem2.9
Mascot312,25553.3SEQUEST, MyriMatch, X!Tandem2.2
OMSSA3888933.3SEQUEST, MyriMatch, X!Tandem2.1
X!Tandem3717625.3SEQUEST, MyriMatch, InSpecT2.9
MyriMatch3634921.7SEQUEST, X!Tandem, InSpecT2.9
SEQUEST3501716.4MyriMatch, X!Tandem, InSpecT2.9
InSpecT413,85062.3SEQUEST, MyriMatch, X!Tandem, OMSSA3.1
Mascot412,81355.7SEQUEST, MyriMatch, X!Tandem, InSpecT3.1
OMSSA4941235.3SEQUEST, X!Tandem, MyriMatch, InSpecT3.1
X!Tandem4766727.0SEQUEST, MyriMatch, InSpecT, OMSSA3.1
MyriMatch4684123.4SEQUEST, X!Tandem, InSpecT, OMSSA3.1
SEQUEST4550818.0MyriMatch, X!Tandem, InSpecT, OMSSA3.1