Summary
There are 3.5 to 5 times more molecules of β-galactosidase than of galactoside acetyltransferase coded by the lac operon of E. coli (Zabin and Fowler, 1970). This natural polarity does not result from premature transcription termination; each RNA polymerase appears to transcribe to the end of the operon.
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References
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Communicated by W. Gilbert
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Lim, L.W., Kennell, D. Evidence against transcription termination within the E. coli lac operon. Molec. gen. Genet. 133, 367–371 (1974). https://doi.org/10.1007/BF00332713
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DOI: https://doi.org/10.1007/BF00332713