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Table 5 Cross-platform correlation of relative abundances of E. coli lipidsa

From: A novel informatics concept for high-throughput shotgun lipidomics based on the molecular fragmentation query language

 

Statistical

Orbitrap versus QSTARc

Orbitrap versus MPIS QSTARd

QSTAR versus MPIS QSTARe

Mode

Estimatesb

PE

PG

PE

PG

PE

PG

MS

Correlation coefficient

0.99

0.99

0.97

0.94

0.95

0.94

 

Slope

0.95

1.14

1.0

0.85

1.03

0.89

MS/MS

Correlation coefficient

0.99

0.99

0.97

0.94

0.95

0.94

 

Slope

0.96

0.96

1.00

0.85

1.03

0.89

  1. aRelative abundances of PE and PG species are presented in Figure 10. bThe values of correlation coefficients R2 and slopes were calculated from corresponding scatter plots. cSpecies were quantified by LipidXplorer using MS and MS/MS spectra acquired independently on the Orbitrap and QSTAR, respectively. MS/MS experiments were performed in data-dependent acquisition mode. dSpecies were quantified by LipidXplorer using, respectively, MS and MS/MS spectra acquired at the Orbitrap machine. Relative abundances of individual species were correlated against corresponding relative abundances independently determined by MPIS on the QSTAR and LipidProfiler software. eSpecies were quantified by LipidXplorer using, respectively, MS and MS/MS spectra acquired on the QSTAR machine in data-dependent acquisition mode. Relative abundances of individual species were correlated with those determined by MPIS and LipidProfiler.