4OVB:
reference: Multiple enzymatic activities of ParB/Srx superfamily mediate sexual conflict among conjugative plasmids., Maindola P, Raina R, Goyal P, Atmakuri K, Ojha A, Gupta S, Christie PJ, Iyer LM, Aravind L, Arockiasamy A, Nat Commun. 2014 Oct 31;5:5322. doi: 10.1038/ncomms6322. PMID: 25358815

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