Biochemistry 4th Edition by Reginald Garrett, Charles Grisham

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Helical parameters for a double-stranded DNA
X-ray diffraction studies indicate the existence of a novel double-stranded DNA helical conformation in which Z (the rise per base pair) = 0.32 nm and P (the pitch) = 3.36 nm. What are the other parameters of this novel helix: (a) the number of base pairs per turn, (b) ø (the mean rotation per base pair), and (c) c (the true repeat)