title: Nucleotide clusters in deoxyribonucleic acids. I. Isolation of purine oligonucleotides.
mesh_terms: D000468:Alkalies; D000818:Animals; D002417:Cattle; D055598:Chemical Phenomena; D002621:Chemistry; D002845:Chromatography; D004247:DNA / Q000032:analysis*; D006358:Hot Temperature; D006834:Hydrazines; D008722:Methods; D009705:Nucleosides; D010744:Phosphoric Monoester Hydrolases; D010758:Phosphorus; D011119:Polynucleotides; D011687:Purines / Q000302:isolation & purification*; D013950:Thymus Gland / Q000166:cytology; D014508:Urea; D014688:Venoms
chemical_list: D000468:Alkalies; D006834:Hydrazines; D009705:Nucleosides; D011119:Polynucleotides; D011687:Purines; D014688:Venoms; D010758:Phosphorus; D014508:Urea; D004247:DNA; D010744:Phosphoric Monoester Hydrolases