Optical properties of CsDNA films as a function of hydration.
J Biomol Struct Dyn
; 11(6): 1277-86, 1994 Jun.
Article
em En
| MEDLINE
| ID: mdl-7946074
The refractive indices of wet-spun films of CsDNA have been measured for light polarized parallel and perpendicular to the helical axis as a function of relative humidity (RH). These data have been combined with previously published data (Biopolymers 30 (1990) 877-887) for the volume per base pair and water content as a function of RH in order to extract the optical polarizabilities. This work was motivated by the study of Weidlich et al. (Biopolymers 26 (1987) 439-453) who reported a approximately 35% increase at the A-to-B transition in the parallel and perpendicular polarizabilities of NaDNA. In contrast, a much smaller increase in the polarizabilities of CsDNA is found near the A-to-B transition: approximately 12% for the perpendicular direction and < or = 4% for the parallel direction.
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Base de dados:
MEDLINE
Assunto principal:
DNA
/
Água
/
Conformação de Ácido Nucleico
Idioma:
En
Ano de publicação:
1994
Tipo de documento:
Article