Plasmid pET19mod_rfaH-F51C-S139C encoding RfaHCC was generated by successive site-directed mutagenesis according to the QuickChange Site-Directed Mutagenesis Kit protocol, using pET19mod_rfaH as a template33 (link). All other plasmids were constructed by standard molecular biology approaches with restriction and modification enzymes from New England Biolabs. Sequences of all plasmids were confirmed by Sanger sequencing either at the Genomics Shared Resource Facility, Ohio State University, USA or at Eurofins Genomics, Germany.
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