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![Electron Paramagnetic Resonance Spectroscopic Identification of the Fe–S Clusters in the SPASM Domain-Containing Radical SAM Enzyme PqqE | Biochemistry Electron Paramagnetic Resonance Spectroscopic Identification of the Fe–S Clusters in the SPASM Domain-Containing Radical SAM Enzyme PqqE | Biochemistry](https://pubs.acs.org/cms/10.1021/acs.biochem.9b00960/asset/images/medium/bi9b00960_0001.gif)