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doi:10.1534/genetics.106.060426
A more recent version of this article appeared on August 1, 2006.
NOTE |
Exonuclease requirements for recombination of 
phage in recD mutants of Escherichia coli
Damir Dermic 1*, Davor Zahradka 1 and Mirjana Petranovic 1
1 Ruder Boskovic Institute
* To whom correspondence should be addressed. E-mail: dermic{at}irb.hr.
Submitted on May 8, 2006
Revised on May 11, 2006
Accepted on 11 May 2006
Recombination of 
red gam phage in recD mutants is unaffected by inactivation of RecJ exonuclease. Since nucleases play redundant roles in E. coli, we inactivated several exonucleases in a recD mutant and discovered that 5'-3'; exonuclease activity of RecJ and exonuclease VII is essential for recombination, whereas exonucleases of 3'5'; polarity are dispensable. The implications of the presented data on current models for recombination initiation in E. coli are discussed.
Key Words: RecBC enzyme, exonucleases: ExoI, ExoVII, ExoX, RecJ, SbcCD, lambda lytic crosses
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