Abstract
Phenol-extracted, infectious deoxyribonucleic acid (DNA) species from φ105 phage particles, from φ105 lysogenic bacteria, and from induced φ105 lysogenic bacteria were sedimented in sucrose gradients. Infectious DNA from φ105 particles sedimented like the bulk of mature phage DNA in neutral sucrose. Infectivity of prophage DNA was associated with fast-sedimenting material of heterogenous size. Infectious vegetative phage DNA sedimented somewhat faster than mature phage DNA; it was rapidly converted to a poorly infectious form during the infection.
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Selected References
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