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Journal of Bacteriology, February 2002, p. 859-860, Vol. 184, No. 3
0021-9193/01/$04.00+0 DOI: 10.1128/JB.184.3.859-860.2002
Copyright © 2002, American Society for Microbiology. All Rights Reserved.
Department of Biology, Indiana University, Bloomington, Indiana 47405
Received 2 August 2001/ Accepted 1 November 2001
A genetic element integrating site specifically into a prokaryotic gene usually carries a copy of the 3' portion of that gene that restores the active gene even as the original is disrupted. A cryptic element in Mesorhizobium loti instead carries a copy of the 5' end of the tRNA gene into which it integrated. This has implications for the evolution of new integrase-site combinations.
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