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Calculated microwave absorption of double‐helical B‐conformation poly(dG)·poly(dC)
Author(s) -
Kohli M.,
Mei W. N.,
Prohofsky E. W.,
Van Zandt L. L.
Publication year - 1981
Publication title -
biopolymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.556
H-Index - 125
eISSN - 1097-0282
pISSN - 0006-3525
DOI - 10.1002/bip.1981.360200415
Subject(s) - chemistry , microwave , absorption (acoustics) , brillouin zone , helix (gastropod) , brillouin scattering , molecular physics , scattering , radiation , eigenvalues and eigenvectors , optics , atomic physics , physics , optical fiber , quantum mechanics , ecology , snail , biology
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.