Biopolymers and cell. 1989. Volume 5. № 1. 27 - 31
G. M. Mrevlishvii, V. M. Sokhadze, G. Sh. Japaridze, D. A. Tatishvili, N. E. Yackobashvili
MICROCALORIMETRIC STUDIES IN HYDRATION OF poly(dA) poly(dT) AND poly(dG)-poly(dC) POLYNUCLEOTIDES
Summary
The calorimetric data show: 1) poly (dA) poly (dT) hydration is na t = 2 7 . 0 ± l M H 20/MBP at all values of relative humidity (RH); 2) poly (dG) poly (dC) hydration at high values of RH is nGC = 16.0± 1 MH2O/MBP; 3) thermodynamic parameters of ice-water phasetransition in poly(dQ) poly (dC) solutions and gels are abruptly changed with a decrease of the total water content (in the RH range of 90-60 %; 4) poly(dG)poly(dC) hyd-ration at low RH is /toe = 12.0±1MH20/MBP; 5) the observed hydration change of poly (dG) poly (dC) (by 4±1MH20/MBP) points to the conformational transition of this polymer within the limits of double-stranded state during the dehydration.