Biopolymers and cell. 1989. Volume 5. № 5. 48 - 55

V. A. Sorokin, V. L. Galkin, V. A. Valeev, E. S. Arkhipova, G. 0. Gladchenko, Yu. P. Blagoi

STUDIES IN HYDRATION ENERGETICS OF NUCLEIC ACID COMPONENTS BY THE DIFFERENTIAL UV^SPECTROSCOPIC METHOD

Summary

    Differential UV spectra of CMP, UMP, AMP, IMP, GMP and Quo are obtained, which are due to dehydration of these substances during heating of their aqueous solutions from 20 to 90 °C. The enthalpies and entropies of hydration characterizing the interaction between water molecules and heteroatoms of the base rings are calculated. The entropy term greatly contributed to the variations of the free Gibbs energy for UMlP, IMP, AMP, GMP and Quo. The enthalpy and entropy terms are comparable for CMP.