O

munication) i

Leuconostoc s

IS1070 1027 28 IS30 > 15 Ln. lactis (Vaughan and De Vos, 1995) O

IS1165 1553 39 ISL3 4-13 Ln. mesenteroides subsp. cremoris (Johansen and Kibenich, l

Streptococcus thermophilus C

IS1193 1411 24 ISL3 NDh S. thermophilus (Schmitt et al., 1998) A

o b Length in base pairs of the terminal repeat sequences.

"Classification scheme based on the major features of prokaryotic IS families. See Mahillon and Chandler (1998) for details. d As established from the nucleotide sequence of the IS or one of its isoforms.

e DNA-DNA hybridizations indicated that this element was not present in 8 other Lactobacillus sp. or 12 species from 8 other genera. f DNA-DNA hybridizations indicated this element was not present in Lb. acidophilus, Lb. delbrueckii, or S. thermophilus. g DNA-DNA hybridizations indicated this element was not present in Lb. acidophilus, Lb. casei, Lc. lactis, or S. thermophilus. h Not determined.

i ISS1 elements have been divided into three subgroups (a, ß, and y) based on nucleotide sequence homology (Bourgoin et al., 1996). Southern hybridizations detected homologous sequences in Lb. casei, Lb. plantarum, En. faecalis and P. acidilactici but not in Lb. acidophilus, Lb. gasseri, or Ln. paramesenteroides (Polzin et al., 1993). DNA-DNA hybridizations detected homologous sequences in Lb. casei and Lb. plantarum (Huang et al., 1992). j Information on copy number is limited to the Lc. lactis multidrug resistance plasmid pK214.

k As determined from the nucleotide sequence of the Lc. lactis multidrug resistance plasmid pK214 or of the Lc. lactis IL1403 genome. ' Homologous sequences were detected by DNA-DNA hybridization in Lb. casei, Lb. helveticus, Ln. lactis, O. oeni, and Pediococcus sp. but not in Lc.

m DNA-DNA hybridization detected homologous sequences in Lc. lactis but not Lb. delbrueckii.

IS1194 1200 16 IS4 1 & thermophilus, Lc. lactis (Bourgoin et al., 1998)m

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