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. 2012 Mar 29;7(3):e34067. doi: 10.1371/journal.pone.0034067

Table 5. Strains and plasmids used in this study.

Strain/plasmid Relevant characteristics Source
Strains
Escherichia coli
 DH5α General purpose cloning strain; Δ(lacZ)M15 New England Biolabs
 OP50 Food source for culturing C. elegans Caenorhabditis Genetics Center
 DBS7 DH5α harboring pEXG2 carrying the 1520 bp ΔampR fragment (pDBS7) This study
 DBS220 DH5α harboring the 944 bp promoterless ampR ORF cloned into pCR2.1 TOPO (pDBS220) This study
 DBS271 DH5α containing the 944 bp ampR ORF subcloned as a EcoRI-SacI fragment from pDBS220 into pMMB67EHGm This study
Pseudomonas aeruginosa
 PAO1 Wild-type [42]
 PKM314 PAO1 with pMMB67EH-Gm (empty vector) This study
 PKM315 PAOΔampR; In-frame deletion of ampR (PA4109) This study
 PKM316 PAOΔampR with pMMB67EH-Gm (empty vector) This study
 PKM317 PAOΔampR (pAmpR); ampR ORF on pMMB67EH-Gm (pDBS271) moved into PAOΔampR; IPTG-inducible; GmR; ampR complementing clone This study
 PAOretS::aacC1 Gm insertion mutant of retS; hyper biofilm-former S. Lory
 PAOΔpelΔpslΔalgD In-frame triple deletion of the algD ORF and pel and psl operons; biofilm non-former S. Lory
Staphylococcus aureus
 DBS116 Wild type S. aureus used for LasA assays Lab collection
Plasmids
 pCR2.1 TOPO TA cloning vector for PCR products; ApR, KmR; ColE1 f1 ori lacZα Invitrogen
 pRK600 Helper plasmid for conjugation [133]
 pEXG2 Allelic exchange vector; GmR, colE1 ori, oriT, sacB [131]
 pMMB67EH-Gm GmR; IncQ, RSF1010, lacIq Ptac expression vector [134]
 pDBS7 pEXG2 with the ΔampR fragment, flanked by EcoRI and BamHI sites This study
 pDBS220 pCR2.1 TOPO containing the 944 bp ampR ORF, PCR amplified from the PAO1 genome using DBS_ampRF2 and DBS_ampRR2 This study
 pDBS271 pMMB67EH-Gm containing the ampR ORF, subcloned as an EcoRI-SacI fragment from pDBS220 This study