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. 2021 May 22;11(6):778. doi: 10.3390/biom11060778

Figure 5.

Figure 5

Spin labels commonly used for DEER. (a) MTSL: Reaction with the thiol side chain creates the disulfide-linked side chain R1. (b) IAP: SN2 reaction creates the thioether-linked PROXYL side chain. (c) IDSL: Sulfhydryl-disulfide exchange leads to formation of the short spin label side chain V1.