This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
PDB hk EBI. Alpha and beta proteins or PFLlike glycyl radical enzymes PFLlike glycyl radical enzymes Class III anaerobic ribonucleotide reductase NRDD subunit Class III anaerobic ribonucleotide reductase NRDD subunit EBI hk November Class III anaerobic ribonucleotide reductase NRDD subunit Files uploaded by Nichalp's script