Enhanced DNA Visualization
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Legend

Phosphate (P)

Deoxyribose (S)

Adenine (A)

Thymine (T)

Guanine (G)

Cytosine (C)

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H-Bond

Backbone Bond

Backbone Helix 1

Backbone Helix 2

DNA Structural Parameters

Helix Pitch (P): 34 Å / turn

Helix Diameter (D): ~20 Å

Base Pair Rise: 3.4 Å / bp

Base Pairing Rules:

A = T (2 H-bonds)

G ≡ C (3 H-bonds)

Chargaff's Rule: (A+G)/(T+C) ≈ 1