B form DNA
A right-handed double-helical conformation of DNA normally seen in solution described by James Watson and Francis Crick (1953). A second DNA conformation (A form) is seen in unhydrated DNA (fibres or crystals of oligonucleotides). B-DNA also differs from other DNAs (i.e., A, C, D, E, and Z) by having 10 base pairs PER turn, +36˚ rotation PER base pair, 3.4A˚ vertical rise PER base pair and 23.7A˚ helical diameter.
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