Evidence for plasmid-mediated restriction-modification in Mycobacterium avium intracellulare.


Mycobacterium avium intracellulare strain LR25 carries three plasmids with molecular weights of 11.2, 18.3 and 107 X 10(6) as determined by electron microscopy. A number of phages propagated on Mycobacterium smegmatis ATCC 607 were tested for their ability to infect strain LR25. Phage JF2 gave an efficiency of plating of 10(-4) on strain LR25, but phage JF2… (More)


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