| 1. | The RNA : DNA duplex then exits through another basic depression.
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| 2. | They can also form triple helices in conjunction with the DNA duplex.
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| 3. | Each daughter strand becomes part of a new DNA duplex.
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| 4. | A-DNA, is a form of the DNA duplex observed under dehydrating conditions.
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| 5. | Step 2 : RecBCD initiates unwinding of the DNA duplex through ATP-dependent helicase activity.
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| 6. | New DNA synthesis fills in any gaps, and ligation restores the DNA duplex as two continuous strands.
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| 7. | Topoisomerase IV in " E . coli " unlinks or decatenates the two circular DNA duplexes.
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| 8. | This tail can be bound by RecA protein, which promotes strand exchange with an intact homologous DNA duplex.
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| 9. | Helicase is an enzyme which breaks hydrogen bonds between the base pairs in the middle of the DNA duplex.
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| 10. | Step 6 : RecBCD unbinds from the DNA duplex, leaving a RecA nucleoprotein filament on the 3'tail.
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