TABLE 3.

Summary of B31 counterpart linear plasmids present in natural isolates of B. burgdorferi^a

Strain (origin)	Hybridization of DNA probes to B. burgdorferi isolates
	lp5	lp17	lp21	lp25	lp28-1	lp28-2	lp28-3	lp28-4	lp36	lp38	lp54	lp56
19678 (NY)	−	−−	−−	++	++	++	++	+++	+−+++	++++++	−+	−−
21645 (WI)	−	−+	−−	+−	−+	++	++	+++	−−+−+	−−−−−−	++	−−
21721 (WI)	−	−−	−−	+−	+	−+	++	+++	−−+−+	++++++	++	−−
27579 (CT)	−	+−	−−	+−	−+	++	++	+++	+−+++	++++++	++	−−
27982 (PA)	−	++	−−	++	++	++	++	+++	+−+−+	−−−−−+	−+	−−
27985 (CT)	−	−−	−−	++	++	++	++	+++	+−+++	++++−+	++	++
28534 (MD)	−	−+	−−	−−	++	++	++	+++	+−+++	−−−−−−	++	−−
29592 (CT)	−	++	−−	++	++	++	++	+++	−+++	++++++	++	−−
29805 (CT)	−	+	−−	++	−+	++	++	+++	+−−++	++++++	++	−−
30757 (CT)	−	−+	++	++	++	++	++	+++	+++++	−−−−−−	++	++
CA-3-87 (CA)	−	−−	−−	+	−+	−−	++	−++	−−+++	−−−−−−	++	−−
WI91-23 (WI)	+	++	−−	++	−+	++	++	+++	+−+++	++++++	−+	−−
N40 (NY)	+	++	−−	++	+	++	+−	+++	−+++	++++++	++	−−
HB19 (CT)	−	−−	−−	++	++	++	++	+++	+−+++	++++++	++	−−
B31 MI (NY)	+	++	++	++	++	++	++	+++	+++++	++++++	++	++

^aStrain names are followed by the name of the United States state (in parentheses) in which they were isolated. Each of the remaining columns represents a different DNA probe from Table 1, going from left to right across each plasmid map (orientation as in references 8 and 12). −, no hybridization; +, hybridization occurred with a plasmid similar in size (<15% different) to the B31 plasmid from which the probe was derived (hybridization to other plasmids may also have occurred); + and , hybridization to only a plasmid(s) >15% different in size from the B31 plasmid from which the probe was derived; , hybridization in that strain only to a plasmid(s) of a size >10% different from the plasmid(s) with which other probes from that B31 plasmid react.