Abstract:
:Flow linear dichroism measurements extended into the vacuum uv region yield inclinations for the base normal from the helix axis of 21 degrees for dA and 40 degrees for dT in the X-form of poly(dAdT).poly(dAdT). These inclination angles are similar to the B form of the synthetic polymer, but the axes around which the bases incline are different. Hydrogen-bonded base pairs are consistent with the geometry for the standard B, C, D, and Z forms of natural DNA, but will not fit into the A form. Fourier transform ir spectra indicate that the X form has sugar pucker and phosphate geometry similar to B-form DNA, and supports the dinucleotide repeat with two kinds of phosphates seen in earlier work, in analogy to Z-form DNA. Clearly, X-form DNA has a unique geometry.
journal_name
Biopolymersjournal_title
Biopolymersauthors
Riazance-Lawrence JH,Kang H,Chou PJ,Johnson WC Jr,Vorlícková Mdoi
10.1002/bip.360341104subject
Has Abstractpub_date
1994-11-01 00:00:00pages
1469-76issue
11eissn
0006-3525issn
1097-0282journal_volume
34pub_type
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