Bacillus pumilus strain NRRL B-3275 is lysogenic for an inducible, nondefective temperate bacteriophage phi75. phi75 infects and lysogenizes several asporogenic mutants of B. pumilus strain NRS 576 but does not productively infect the spore(+) parent. phi75 DNA is a linear duplex with a mol wt of about 29 x 10(6) and a buoyant density of 1.701 g/cm(3). The location of the phi75 prophage attachment site on the chromosome of both host strains is adjacent to a lysine marker. The apparent order is phi75 att lys trp.
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M G Bramucci (1974) studied this question.
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