English: Geobacter sulfurreducens Cas1-Cas2-Cas4 complex bound to double stranded protospacer adjacent motif (PAM) spacer DNA. Cas1 homodimers (blue) bind to each side of the Cas2 homodimer (red) with a Cas4 Fe-S nuclease (cyan) bridging the two. The 3' end of each DNA strand threads into the Cas4 active site. The iron-sulfur cluster in Cas4 and interacting residues are rendered as ball-and-stick models. PDB: 7MI4
Date
(upload to Wikimedia Commons), 16 April 2021 (deposition at PDB)
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