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. Author manuscript; available in PMC: 2022 Jun 1.
Published in final edited form as: Curr Opin Biotechnol. 2020 Dec 25;69:43–51. doi: 10.1016/j.copbio.2020.12.005

Figure 1.

Figure 1

Metalloporphyrins are versatile scaffolds for oxene, carbene, and nitrene transfer reactions. The development of non-natural carbene and nitrene transferases was inspired by natural heme monooxygenases, with Compound I as the key catalytic intermediate [6,7]. These new activities were initially discovered by testing hemoproteins for the ability to mimic known activities of small-molecule metalloporphyrin catalysts [9,10].