Fig. 4: A rigid Fe–S cluster core holds the mobile Ni–Fe pair.
From: Metalloradical-driven enzymatic CO2 reduction by a dynamic Ni–Fe cluster
Superimposition of the structures of the C clusters in the five states determined in this study, namely, Cred1, Cred2, Cint,i, Cint,o and Cint–CO, showing that the Fe3S4 core remains unchanged despite the movements of the Ni and Fe1 ions. The five states are colour-coded and the positions of Ni and Fe1 are indicated.
