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MB Sample ID: SA093387
Local Sample ID: | C2350.2_t7 |
Subject ID: | SU001351 |
Subject Type: | Cultured cells |
Subject Species: | Plasmodium falciparum |
Taxonomy ID: | 5833 |
Select appropriate tab below to view additional metadata details:
Combined analysis:
Analysis ID | AN002120 |
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Analysis type | MS |
Chromatography type | Reversed phase |
Chromatography system | Thermo Dionex Ultimate 3000 |
Column | Phenomenex Synergi Hydro RP 100 A (100 x 2mm,2.5um) |
MS Type | ESI |
MS instrument type | Orbitrap |
MS instrument name | Thermo Exactive Plus Orbitrap |
Ion Mode | NEGATIVE |
Units | Peak Area |
MS:
MS ID: | MS001975 |
Analysis ID: | AN002120 |
Instrument Name: | Thermo Exactive Plus Orbitrap |
Instrument Type: | Orbitrap |
MS Type: | ESI |
MS Comments: | Raw data files from the Thermo Exactive Plus orbitrap (.raw) were converted to a format compatible with our analysis software (.raw¡.mzXML) and spectral data (.mzXML files) were visualized in MAVEN. The labeled [13C4, 15N1]-Aspartate internal standard intensity was assessed for technical reproducibility. Peaks for each metabolite in the targeted library were identified based on proximity to standard retention time, the observed mass falling within 10 ppm of the expected m/z (calculated from the monoisotopic mass), and the signal/blank ratio (minimum, 10,000 ions). Based upon the above criteria, peaks were manually inspected and demarcated as good or bad based on peak shape. Peak areas were exported into an R working environment (http://www.R-project.org) to calculate log2 fold changes for each sample compared to an untreated control. Metabolites that were not reliably detected across 90% of all the trials were removed prior to additional analysis to minimize subsequent imputation bias. The peak areas for any remaining metabolites not detected were imputed to have 10,000 ions, and metabolites detected below background levels (negative after blank subtraction) were maintained as “0” prior to averaging and log2 calculation. Because our extraction method did not include a wash step we excluded metabolites found in the RPMI-based medium. |
Ion Mode: | NEGATIVE |