TABLE 1.

Primers used in PCR experiments

Primer	Positiona	Sequence 5′→3′	Annealing temp (°C)	Refer- ence(s)
F536	519-536	CAGCAGCCGCGGTAATAC	62	32
R1406	1406-1389	ACGGGCGGTGTGTACAAG	62	32
F67	50-67	AACACATGCAAGTCGAAC	55	32
R685	685-666	TCTACGCATTTCAC(CT)GCTAC	55	32
F984	968-984	AACGCGAAGAACCTTAC	53	15, 17
F984GC	968-984	CGCCCGGGGCGCGCCCCGGGCGGGGCGGGGGCACGGGGGGAACGCGAAGAACCTTAC	53	15
R1378	1401-1378	CGGTGTGTACAAGGCCCGGGAACG	53, 63	15, 17
F243	226-243	GGATGAGCCCGCGGCCTA	63	15
F203α	175-203	CCGCATACGCCCTACGGGGGAAAGATTTAT	56	13
F948β	931-948	CGCACAAGCGGTGGATGA	64	13
L	1514-1494	CTACGG(AG)TACCTTGTTACGAC	56, 64	K. Smalla

^aEscherichia coli numbering (4).