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J. Biol. Chem., Vol. 268, Issue 23, 17051-17056, Aug, 1993
F Zalatan, J Galloway-Salvo and T Platt
We have analyzed with deletion mutations the Escherichia coli rho-
dependent transcription terminator trp t'. This site, 211 nucleotides in
length, contains multiple sequence elements that are recognized by rho.
Among these multiple elements are two that together appear to be important
for full transcription termination efficiency in vitro and are similar to
the rutA and rutB sequence elements in the lambda tR1 rho-dependent
terminator previously described by Chen and Richardson (1987). The results
suggest for the first time that common functionally important elements are
shared among rho-dependent terminators. Other regions of trp t' also appear
to contribute to its functional efficiency, consistent with the idea that
rho-dependent terminators contain dispersed and redundant recognition
segments.
Deletion analysis of the Escherichia coli rho-dependent transcription terminator trp t'
Department of Biology, University of Rochester, New York 14642.
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