Fig. 5: MALDI-TOF MS analysis of QhpG-catalyzed reaction products.

a The reaction product with the W43F mutant of crosslinked QhpC as the substrate for QhpG (*fragment d of Asp-N digestion). The calculated mass (m/z) is indicated within parentheses. b The reaction product formed by the wild-type (WT) and various mutants (E42A, R47A, R70A, W183F, and R314A) of QhpG (fragment d of Asp-N digestion).