title: Nucleotide composition of ribonucleic acid from vegetative and flowering cocklebur-shoot tips.
mesh_terms: D009705:Nucleosides / Q000737:chemistry*; D009711:Nucleotides / Q000737:chemistry*; D010944:Plants / Q000737:chemistry*; D012313:RNA / Q000737:chemistry*; D012098:Reproduction; D031210:Xanthium
chemical_list: D009705:Nucleosides; D009711:Nucleotides; D012313:RNA
keywords: NUCLEOSIDES AND NUCLEOTIDES/chemistry; PLANTS/chemistry; RIBONUCLEIC ACID/chemistry