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(A) Nucleic acid sequence of PczcD. Motif1 (in boxes) and Motif2 (red letters) are the binding sites for the SczA regulator. The start codon of czcD is indicated in italics. The ribosome binding site (RBS) of PczcD is shown in boldface. −35 and −10 sequences are underlined (10). (B) Expression systems used in this study. Hairpins represent terminators.
