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. 2004 Sep;72(9):5143–5149. doi: 10.1128/IAI.72.9.5143-5149.2004

FIG. 1.

FIG. 1.

Construction of marked and unmarked deletions of virB1 and virB2. For details, see the text. The positions of deletions in the B. abortus virB locus are numbered according to the sequence found under GenBank accession number AF226278 (30).