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. Author manuscript; available in PMC: 2020 Jun 25.
Published in final edited form as: Annu Rev Biochem. 2020 Jun 20;89:45–75. doi: 10.1146/annurev-biochem-013118-111843

Figure 11.

Figure 11.

N3NDP (Figure 4B) is a potent inhibitor of all Ia RNRs (62,63). Studies of this inhibitor provided a glimpse of unprecedented chemistry associated with reactive radical species in an active site cavity and the challenges associated with radical structure elucidation. It also provided the first evidence for half-sites reactivity.