title: The B-Z transition of a polynucleotide with a 10-base pair repeating sequence.
abstract: In this communication we report the synthesis and characterization of a defined-sequence, alternating purine-pyrimidine polymer with a 10-base pair repeating unit: poly[d(CGCGCGTGCA)]. It is seen that the polymer can undergo a right-left-hand helical transition, but the conformational transition requires much higher salt concentration than with poly[d(G-C)]. The results are interpreted in terms of interaction of the polymer with solvent molecules.
mesh_terms: D002942:Circular Dichroism; D009690:Nucleic Acid Conformation; D009994:Osmolar Concentration; D011089:Polydeoxyribonucleotides; D011108:Polymers; D012091:Repetitive Sequences, Nucleic Acid
chemical_list: D011089:Polydeoxyribonucleotides; D011108:Polymers; C019530:poly(dC-dG)