KINK COUPLES IN DEOXYRIBONUCLEIC-ACID (DNA) DOUBLE HELICES

Some previous articles have consistently formulated the open states in deoxyribonucleic acid (DNA) and synthetic polynucleotide double helic es as coupled sine-Gordon equations. But the solutions of the equation s have not been obtained for general cases. In this paper, that is don e by applying a function transformation. The method leads to a superpo sition relation cos[1/2(phi+phi')] = C cos[1/2 (phi-phi')], for C = co nst, which gives the soliton couples, the helix-kink couples and so on . Some interesting properties are treated in detail and the applicatio ns of these properties in the dynamics of real B-DNA are discussed.