The plasmid pJW566 was isolated from L.lactis subsp. cremoris W56,one strain for Danish chadder mixed starter cultures.

• 从丹麦乳酪发酵启子乳酸乳球菌乳脂亚种 (Lactococcuslactissubsp .；cremoris)W56中；分离到一个 2 2 4kb的质粒pJW566；将该质粒转化到无质粒且噬菌体敏感的L