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Genetic relationships among bacteriophages and bacteria have been investigated using an extension of the DNA-agar technique. Thermal elution profiles, each characteristic of a specific DNA-DNA reaction, have been obtained from reactions involving homologous and heterologous DNAs. A sizable portion of the DNA of lysogenic (or semilysogenic DNA) viruses has been shown to be homologous to the DNA of...
The kinetics of β-galactosidase induction in E. coli ML 3 have been studied. Following addition of inducer, the rate of enzyme synthesis accelerates from the uninduced to a steady-state rate. At saturating concentration of inducer the time constant (T c ) for this process is 2.5 to 3 minutes. With decreasing inducer concentration (I), increasing time constants are observed. I/I + K′ approximates...