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. 2019 Aug 19;5(9):1514–1522. doi: 10.1021/acscentsci.9b00416

Figure 2.

Figure 2

Testing PhoX peptide enrichment in a complex background. (a) Sensitivity—mixing cross-linked BSA peptides in decreasing amounts in a fixed background of E. coli peptides provides an estimate of the detection limit of the methodology. (b) Recovery method—mixing cross-linked BSA peptides in equal amounts in an increasing background of E. coli peptides allows for recovery of cross-linked BSA peptides upon enrichment. The estimated cross-link amounts for the given cross-linked BSA peptides are shown above the bars.