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. Author manuscript; available in PMC: 2016 Jun 10.
Published in final edited form as: Crit Rev Eukaryot Gene Expr. 2016;26(1):63–96. doi: 10.1615/CritRevEukaryotGeneExpr.v26.i1.70

FIG. 13.

FIG. 13

The models for Holliday junction and branch migration. (A) Models I, II, and III correspond to the HJ conformations with the exchanging arms in the parallel arrangement, extended conformation, and antiparallel arrangement, respectively. (B) Assembly of HJ after the multiple branch migration steps. HJ in the antiparallel conformation III cannot undergo branch migration, but the other two conformations can. (C) The competition of branch migration leading to the separation of the DNA duplexes [reprinted with permission from the American Chemical Society, Copyright 2009].86