Proceedings of the National Academy of Sciences of the United States of America, Vol. 71, No. 1 (Jan., 1974), pp. 63-67 (5 pages) The effects of guanosine tetraphosphate (ppGpp) and guanosine ...
This is a preview. Log in through your library . Abstract The lac genes were fused to the ara promoter by means of phage φ 80 translocations of the lac and ara genes to att80. Homology for a crossover ...
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