How many bases in a heical turn?

(Dave Johnston) daj at mailserver.nhm.ac.uk
Tue Aug 15 03:27:47 EST 1995


Billy,

A-DNA 11
dGGCCGGCC 11
B-DNA 11
dCGCGAATTCGCG 9.7
C-DNA 9.33
D-DNA 8
T-DNA 8
Z- DNA 12
A-RNA 11
A'-RNA 12

Data is, I believe from crystalisation studies. Apparently there are also 
B', C', C'' and E forms and form depends on things like salt 
concentration, humidity etc.

Please don't ask me what the different forms mean or which is 
"biologically true" cos I aint a clue!!!

(data from Nucleic Acids in 
Chemistry and Biology, eds Blackburn and Gait, IRL Press)
DAJ

David A. Johnston
Research Fellow,
Dept of Zoology, The Natural History Museum, Cromwell Road,
South Kensington, London SW7 5BD. England
(tel 071 9389297, fax 071 9388754, email daj at nhm.ac.uk)



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