Fig. 2.

Organization of the cps loci of strains used in this study. D39 was the parental strain for all work performed; gene nomenclature is as described for the sequence with GenBank accession no. YP_815832.1. D39:BCDΔ lacks cps2B, cps2C, and cps2D, as previously described (12). D39:EHA-Cps2C has erm inserted between cps2B and cps2C and the insertion of DNA encoding a small amino acid spacer sequence (RGND), the dual HA tag (YPYDVPDYAAAYPYDVPDYA), and a linker region (GGAGG) between the initiating Met1 and Lys2 of Cps2C.