Abstract
The packaging of cosmid DNA into phage particles during phage lambda growth is described. Evidence is presented supporting the work of others that cosmid transducing phages contain linear multimers of cosmid DNA in which the number of cosmid copies is that required to make a packagable DNA length (greater than 0.77 of the lambda DNA length). The yield of cosmid transducing phages declines sharply as the number of cosmid copies required to make a packagable DNA length increases. The cosmid DNA replication that produces the packaging substrate shares with lambda rolling-circle replication a dependence on the lambda gam gene product.
Published Version
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