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. 2014 Apr 18;9(4):e94266. doi: 10.1371/journal.pone.0094266

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© 2014 Ryu et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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FRT, flippase recognition target site; cI, λ repressor gene; Km^r, kanamycin resistance gene; Cm^r, chloramphenicol resistance gene; exo/beta/gam, λ-Red genes; T1, E. coli rrnB1 terminator; T1(4), four tandem rrnB1 terminator; T0, λ t0 transcriptional terminator.