Abstract

AbstractGuanosine‐5′‐monophosphate is shown to have a remarkable property of forming helical aggregates in neutral aqueous salt solution. The degradation of the ordered structure of 5′‐GMP can be followed by Raman spectroscopy as well as by means of an adiabatic scanning calorimeter. The transition enthalpy for this process is determined for various solutions as a function of the monomer concentration. The extrapolation to the reference state of infinite dilution gives 1.75 kcal · mol−1 for the stacking enthalpy of 5′‐GMP.

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