Proc Natl Acad Sci U S A. 1984 Mar;81(5):1307-11. doi: 10.1073/pnas.81.5.1307.
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Regeneration of insertionally inactivated streptococcal DNA fragments after excision of transposon Tn916 in Escherichia coli: strategy for targeting and cloning of genes from gram-positive bacteria.