Formation of polynucleotide helices having purine nucleotide residues in a syn configuration.
D000227:Adenine Nucleotides; D000588:Amines; D001966:Bromine; D003597:Cytosine Nucleotides; D003903:Deuterium; D006150:Guanine Nucleotides; D009690:Nucleic Acid Conformation; D009691:Nucleic Acid Denaturation; D009711:Nucleotides; D011072:Poly U; D011119:Polynucleotides; D011685:Purine Nucleotides; D013055:Spectrophotometry, Infrared; D013696:Temperature
D000227:Adenine Nucleotides; D000588:Amines; D003597:Cytosine Nucleotides; D006150:Guanine Nucleotides; D009711:Nucleotides; D011119:Polynucleotides; D011685:Purine Nucleotides; D011072:Poly U; D003903:Deuterium; D001966:Bromine