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J Biol Chem. 1982 Nov 25;257(22):13823-7.

The nucleotide sequence of the replication origin beta of the plasmid R6K.


We h ave identified by molecular cloning a region of 283 base pairs of the HindIII 2 fragment of R6K which corresponds to the region of the replication origin beta. This 283 base-pair DNA fragment, when present contiguously with the structural gene for the replication initiation protein of R6K, encoded in the HindIII 9-15 and part of HindIII 2 restriction fragments, will support the replication of a plasmid chimera containing the pBR322 replicon in a pol Ats host at the nonpermissive temperature. The nucleotide sequence of the region of replication origin beta has been determined. The nucleotide sequence has some homology with the ori gamma region of R6K; it has a 15-base-pair homology with the replication origin of Escherichia coli.

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