Abstract
The conjugative transposon Tn916moves intercellularly via an excision/insertion mechanism that involves products ofint-Tnandxis-Tn.Tn5-insertion mutations in these genes were found to be complemented in anEnterococcus faecalishost by specific coresident transposons harboring the corresponding wild-type allele. A determinant designatedtraA,partially overlapping and divergently transcribed fromxis-Tn,is thought to encode a key positively acting regulatory protein needed for expression of conjugation functions. This locus was also shown to express atrans-acting product.
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