ISSN:
1617-4623
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Summary TYMV-dsRNA has been studied by ORD and CD. The spectra indicate a highly ordered secondary structure which disappears upon heating or titrating to acid pH. No distinct acid structure as found for DNA could be observed. Melting profiles of TYMV-dsRNA show a strong dependence on ionic strength which is analogous to synthetic polynucleotide complexes. Upon storage for several months the melting points drop considerably, without change in the ORD spectra. The two sets of melting points obtained for TYMV-dsRNA compare well with the results obtained in the literature: two series of melting points have been found for ds-RNA of a wide variety of origins. If plotted as a function of their G-C content, these data fall on two different lines with different slopes. It is suggested that ds-RNA might exist in two different helical forms and that TYMV-dsRNA might undergo a conformational change in solution upon storage.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00427142
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