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. Author manuscript; available in PMC: 2015 May 18.
Published in final edited form as: Angew Chem Int Ed Engl. 2015 Mar 27;54(21):6330–6334. doi: 10.1002/anie.201501968

Figure 1.

Figure 1

a) Overview of the DEER experiment. b) The mutations and resulting side chains of the most common spin label (R1) and the paramagnetic metal label reported herein (dHis–Cu2+–IDA). The widths of the resultant distance distributions are heavily influenced by the flexibility of the side chain.