472—Model reactions of nucleotide sorption: Part I. Interaction between adenine nucleotides and interface in the hydrocarbon-water-cetyltrimethyl ammonium bromide system

A study has been made of the binding between nucleotides (ATP, ADP) and other anions (HP₃O₁₀^4?, HP₂O₇^3?, HPO₄^2?, SO₄^2?) on the interface in the heptane-water-cetyltrimethylammonium bromide (CTAB) system. The binding between anions and their complexes with CTAB on the interface was registered by two methods: by change in interphase tension values and by change in the potential jump on the interface. The energies of binding of the above anions on the interface in the presence of CTAB are determined.The data obtained enabled us to assess the energy of binding of a negative charge with the interface (- ΔG ? 14.6 ± 0.7 kJ/unit charge).A model has been suggested for a study of the behaviour of the interface-CTAB-anion system and the conditions for specific nucleotide binding have been chosen.