Abstract
Selected characteristics and streptomycin resistance were studied in a UV radiation sensitive (UVS1) and a UV radiation resistant (UVR1) strains, and the data were compared with results obtained with an original type strain. A partial prolongation of the cell cycle in the UVR1 strain as compared with the original type strain could be observed in studying cell volume growth, cell numbers, DNA, RNA and protein synthesis during the synchronous cycle. Under these conditions, the UVS1 strain behaved as a temperature sensitive cell cycle mutant. In inducing streptomycin resistant mutants, the highest frequencies in various doses were recorded in the UVS1 strain.
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