(Note that a third model of recombination ... Once access has been gained, Rad51 polymerizes on the DNA strand to form what is called a presynaptic filament, which is a right-handed helical ...
Analysis of DNA double strand breakage and repair using orthogonal ... and human disease: New Insight from model systems. Journal of Biomedicine and Biotechnology 2, 55–60 (2002).
Rather than hand-threading each DNA strand, the team assembles strands from pre-built DNA bricks about 20 nucleotides long, encoding information by altering some and not others along the way.