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. 2022 Aug 26;50(16):9568–9579. doi: 10.1093/nar/gkac682

Figure 1.

Figure 1.

RNAI structure, sequence comparison between common colE1 origins and RNAI libraries. (A) The predicted structure for RNAI, generated by the ViennaRNA suite (38), consists of three stem loops named (5′→3′) Hairpin III, II, and I. Nucleotides are coloured based on their position in the structure, whether in stem (green), loop (blue), stem bulges and mismatches (yellow), and unpaired (red). (B) Natural plasmids from different compatibility groups show similarities in sequence (shown as ‘.’ in comparison to colE1 origin in pET29) in both stem and loops (highlighted in cyan). (C) Libraries were designed to introduce sequence variation (red) around loop regions. Sequence degeneracies are shown as per IUPAC (N = A, C, G or T; K = C, T).