Fakhretdinov М. I. Russia Ufa Bashkir State University, 450076, Russian Federation, Republic of Bashkortostan, Ufa, st. Zaki Validi 32 Postgraduate student, assistant of the Departmentfakhretdinovmi@pochta.ru Author's articles CONFORMATIONAL B–A TRANSITION IN THE MODEL OF DNA MOLECULE WITH ASYMMETRIC DOUBLEWELL INTERACTION POTENTIAL OF NUCLEOTIDES