@article{oai:repo.qst.go.jp:00043568,
 author = {Ishii, Nobuyoshi and Matsui, Kazuaki and Fuma, Shoichi and Takeda, Hiroshi and Kawabata, Zenichiro and 石井 伸昌 and 府馬 正一 and 武田 洋},
 journal = {FEMS Microbiology Letters},
 month = {},
 note = {We studied the transforming ability of the extracellular plasmid DNA released from a genetically engineered Escherichia coli pEGFP and the culturing conditions for the release of transforming DNA. The transforming ability was evaluated by transformation of competent cells with filtrates of E. coli pEGFP cultures. The number of transformants increased with time when E. coli pEGFP cells grew exponentially in rich medium, but not in stationary phase or when inoculated in freshwater. These results suggested that crude extracellular plasmid DNA had transforming ability and this transforming DNA was mainly released by actively
growing bacteria.},
 pages = {151--154},
 title = {Release of transforming plasmid DNA from actively growing genetically engineered Escherichia coli.},
 volume = {240},
 year = {2004}
}