Figure 1

(a) Scheme of the labeling reaction of MTSSL with the thiol moiety of a protein’s cysteine; The chemical structure of (b) MTSSL and (c) C2-Gd. The leaving group in in the C2-Gd tag appears in red.

(a) Scheme of the labeling reaction of MTSSL with the thiol moiety of a protein’s cysteine; The chemical structure of (b) MTSSL and (c) C2-Gd. The leaving group in in the C2-Gd tag appears in red.