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Calculated microwave absorption of double-helical B-conformation poly(dG)·poly(dC)

✍ Scribed by M. Kohli; W. N. Mei; E. W. Prohofsky; L. L. Van Zandt

Book ID
102765133
Publisher
Wiley (John Wiley & Sons)
Year
1981
Tongue
English
Weight
588 KB
Volume
20
Category
Article
ISSN
0006-3525

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✦ Synopsis

Abstract

We have estimated the absorption of microwave radiation by the four acoustic modes of poly(dG)·poly(dC) in B conformation. The eigenvectors used in this calculation are those obtained from a refined normal coordinate analysis by fitting the velocity of the longitudinal acoustic mode to that observed by Brillouin scattering. The acoustic modes couple to the radiation field when translational invariance is broken such as for finite segments of helix and as may be the case in vivo. Calculations for various helix lengths show that the estimated absorption is greater than that of water by at least two to three orders of magnitude in some cases.

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