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. Author manuscript; available in PMC: 2015 Sep 24.
Published in final edited form as: Org Biomol Chem. 2015 Sep 23;13(38):9793–9807. doi: 10.1039/c5ob01410g

Figure 3.

Figure 3

The identical mass linker (IML) design includes a CID-cleavable sulfoxide, lysine-reactive NHS esters, and identical formula modifications after fragmentation, allowing for one peak per peptide in MS2.