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. 2021 Mar 2;12:636597. doi: 10.3389/fpls.2021.636597

FIGURE 4.

FIGURE 4

Summarized results of the site-specific analysis of P4H activity of recombinant P4H candidates from N. benthamiana. Base Peak Chromatograms of the LC-ESI-MS runs are depicted and location of oxidation sites are marked as detected by MS/MS analysis of the synthetic IgA1 sequence VTVPVPSTPPTPSPSTPPTPSPS. Individual MS2 spectra for each peak can be found in Supplementary Figure 5.