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. 2020 Apr 22;8:346. doi: 10.3389/fchem.2020.00346

Figure 4.

Figure 4

N-glycan analysis of the α-HC and JC from purified monomeric and dimeric IgA1. (A) Representative MS-spectra ([M+3H]3+) of the tryptic glycopeptide containing the CH2 resident NLT glycosylation site of the α-HC of HEK293F- and plant-produced IgA1. (B) Representative MS-spectra ([M+2H]2+ and [M+3H]3+) of the tryptic glycopeptide containing the single NIS glycosylation site of the HEK293F- and plant-produced dimeric IgA1 joining chain. N-glycans are abbreviated according to the ProGlycAn system (www.proglycan.com). The most abundant glycoform is highlighted in blue and illustrated with cartoons.