6DD5:
reference: A Reverse Transcriptase-Cas1 Fusion Protein Contains a Cas6 Domain Required for Both CRISPR RNA Biogenesis and RNA Spacer Acquisition., Mohr G, Silas S, Stamos JL, Makarova KS, Markham LM, Yao J, Lucas-Elio P, Sanchez-Amat A, Fire AZ, Koonin EV, Lambowitz AM, Mol Cell. 2018 Oct 4. pii: S1097-2765(18)30784-6. doi:, 10.1016/j.molcel.2018.09.013. PMID: 30344094

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