Volume 188, no. 4, p. 1489-1496, 2006. Page 1495, column 1: The sixth sentence of the first full paragraph should read as follows: The weak partition activity of the c2, c3, and p1 systems may be partly a consequence of intrinsic inefficiency, sensed even in Burkholderia; whereas the efficient c1 parAB is normally supplemented with only two isolated parS sites, those of c2, c3, and p1 are accompanied by three to four nearby parS sites in a clustered arrangement which may serve to compensate for a lower effectiveness of its protein partners.
Page 1495, column 2: The fourth sentence should read as follows: The second chromosome of Vibrio cholerae also betrays a plasmid ancestor through the phylogeny of its ParA (6) as well as by the nature of its replication origin (5).