Structures of dna watsoncrick model of dna hydrogen

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Unformatted text preview: cleic Acids –  Plasticity of Secondary and Tertiary DNA Structure –  Stability of Secondary and Tertiary Structure •  Biophysically Manipulating DNA Structures of DNA & RNA! Structures of DNA! Watson–Crick model of DNA Hydrogen bonding between A ­T and G ­C base pairs. •  The AT pair has two hydrogen bonds. •  The GC pair has three hydrogen bonds. •  The complementary, two ­strand structure of DNA explains how the geneDc material can be replicated. Three H ­bonds Structure of Nucleic Acids This view down the helix axis shows how the base pairs stack on one another, with each pair rotated 36° with respect to the next. •  A side view of the base pairs shows the 0.34 ­nm distance between the base pairs. •  This distance is called the rise of the helix. Structure of Nucleic Acids A space ­filling model of DNA. Each atom’s volume is defined by the van der Waals radius. This mod...
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