Transposition of the conjugative mobile element (Tn 3701) of Etreptococcus pyogenes strain A454 onto the Enterococcus feacalis hemolysin plasmid pIP964 modified the expression of the genes involved in hemolysin production. By hemolysis complementation tests the genes coding for two components required for the hemolytic activity expression were found to be located on the EcoRI E and G fragments of pIP964.
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Bouguénec et al. (1988) studied this question.
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