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B-DNA


B-DNA: Conformation of the Watson-Crick double helix in which the two strands form a right-handed double helix.
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Formation of Z-DNA fom B-DNA is a dynamic process where B-DNA is the relaxed state. When a Z-DNA segment is formed two B-Z junctions form (Fig.3). The crystal structure of such junctions is known.
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The recA protein binds single-stranded DNA, incorporating the DNA into a helical complex with 6 recA molecules and 22 nucleotides/ turn. Adjacent bases are 1.5 times as far apart as they are in a B-DNA double helix.
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