adenine and pyrimidine

adenine has been researched along with pyrimidine in 48 studies

Research

Studies (48)

Timeframe	Studies, this research(%)	All Research%
pre-1990	29 (60.42)	18.7374
1990's	2 (4.17)	18.2507
2000's	11 (22.92)	29.6817
2010's	5 (10.42)	24.3611
2020's	1 (2.08)	2.80

Authors

Authors	Studies
Bos, CJ; Debets, AJ; Kobus, G; Slakhorst, SM; Swart, K	1
Patel, DJ; Radhakrishnan, I	1
Zastawny, TH	1
Evans, VJ; Price, FM; Rotherham, J	1
Davis, DR; Fridborg, K; Grahn, E; Helgstrand, C; Lago, H; Liljas, L; Moss, T; Stockley, PG; Stonehouse, NJ; Sundaram, M; Tars, K	1
Chen, YH; Huang, XL; Li, LQ; Zhang, HY	1
Kejnovská, I; Kypr, J; Vorlícková, M	1
WYATT, GR	1
MCNUTT, WS	1
ROGERS, S	1
FUERST, R; HSU, TC; MILOFSKY, L	1
ARONOW, L	1
HENDERSON, JF; JUNGA, IG	2
CHENG, CC; ROBINS, RK; SUTCLIFFE, EY; ZEE-CHENG, KY	1
JEFFREY, JJ; SCHANKER, LS; TOCCO, DJ	1
MESNARD, G; VASILESCU, D	1
MANDEL, HG; ZIMMERMAN, EF	2
VENNER, H; WEISS, R	1
FEDOROV, NA; KASATKIN, IN	1
HU, PC; LIANG, CC; LIU, CP; WU, H	1
BURNS, VW	1
TARR, HL	1
FAGUET, M	1
BERTHOD, H; PULLMAN, A	1
PULLMAN, B	1
CAILLET, J; CLAVERIE, P; PULLMAN, B	1
HASHIMOTO, K; KUMAKURA, S; TANEMURA, I	1
FUJIMOTO, Y; ONO, N	2
Okamoto, A; Saito, I; Tanaka, K	1
ALLFREY, VG; DALY, MM; MIRSKY, AE	1
Cunniffe, S; Lomax, ME; O'Neill, P; Salje, H	1
Al-Hashimi, HM; Hansen, AL	1
Batey, RT; Gilbert, SD; Stoddard, CD; Wise, SJ	1
Alvarado, F; Bari, S; Bernigaud, V; Hoekstra, R; Huber, B; Lecointre, A; Manil, B; Rangama, J; Schlathölter, T	1
Batey, RT; Gilbert, SD; Mediatore, SJ	1
Amira, MF; El-Ashry, GM; Masoud, MS; Ramadan, AM	1
Dou, Y; Lei, Y; Wang, Y; Wen, Z; Yuan, S	1
Blatter, N; Diederichs, K; Kranaster, R; Marx, A; Obeid, S; Schnur, A; Welte, W	1
Chen, Y; Jiang, J	1
Fürst, S; Jung, B; Möhlmann, T; Witz, S	1
FUERST, R; HSU, TC; SOMERS, CE	1
CHENG, CC; HSU, TC; MILOFSKY, L; ROBINS, RK	1
Albrecht, P; Ford, JP; Kamerow, H; Mandetta, D; Thompson, JT; Vanden Heuvel, JP	1
Beratan, DN; Migliore, A; Rousseau, BJG; Shafei, S; Stanley, RJ	1
Hu, G; Li, H; Wang, J; Xu, S	1

Reviews

1 review(s) available for adenine and pyrimidine

Article	Year
[DNA oxidative damages--free radical modification of bases and sugar moieties]. Postepy biochemii, 1997, Volume: 43, Issue:4 Topics: Adenine; Anaerobiosis; Carbohydrate Metabolism; Cytosine; DNA; Free Radicals; Guanine; Hydroxyl Radical; Mutagenesis; Oxidation-Reduction; Purines; Pyrimidines	1997

Other Studies

47 other study(ies) available for adenine and pyrimidine

Article	Year
Adenine and pyrimidine genes of Aspergillus niger and evidence for a seventh linkage group. Current genetics, 1989, Volume: 16, Issue:4 Topics: Adenine; Aspergillus niger; Genetic Complementation Test; Genetic Linkage; Genetic Markers; Mutation; Pyrimidines; Transformation, Genetic	1989
Solution structure of a purine.purine.pyrimidine DNA triplex containing G.GC and T.AT triples. Structure (London, England : 1993), 1993, Oct-15, Volume: 1, Issue:2 Topics: Adenine; Base Composition; Base Sequence; Computer Graphics; Cytosine; DNA; Guanine; Hydrogen Bonding; Macromolecular Substances; Magnetic Resonance Spectroscopy; Models, Molecular; Molecular Sequence Data; Nucleic Acid Conformation; Oligodeoxyribonucleotides; Purines; Pyrimidines; Thymine	1993
Some aspects of the role of vitamin B12 in nucleic acid synthesis in a neoplastic C3H mouse cell strain. I. Growth studies. Journal of the National Cancer Institute, 1970, Volume: 44, Issue:1 Topics: Adenine; Adenosine; Animals; Cell Division; Cytidine; Deoxyadenosines; Deoxycytidine; Deoxyuridine; DNA, Neoplasm; Folic Acid; Guanine; Mice; Nucleic Acid Precursors; Nucleosides; Pyrimidines; Thymidine; Tumor Cells, Cultured; Uridine; Vitamin B 12	1970
Structural basis of pyrimidine specificity in the MS2 RNA hairpin-coat-protein complex. RNA (New York, N.Y.), 2001, Volume: 7, Issue:11 Topics: Adenine; Bromouracil; Capsid; Capsid Proteins; Guanine; Levivirus; Models, Molecular; Nucleic Acid Conformation; Protein Conformation; Pyrimidines; RNA-Binding Proteins; RNA, Viral; Thiouracil	2001
[Separation and determination of purine bases and pyrimidine bases from nucleic acid hydrolysis by HPLC on BDS column]. Se pu = Chinese journal of chromatography, 2000, Volume: 18, Issue:6 Topics: Adenine; Chromatography, High Pressure Liquid; Cytosine; Guanine; Hypoxanthine; Nucleic Acids; Purines; Pyrimidines; Thymine; Uracil; Yeasts	2000
DNA homoduplexes containing no pyrimidine nucleotide. European biophysics journal : EBJ, 2003, Volume: 32, Issue:2 Topics: Adenine; Base Pairing; Circular Dichroism; DNA; Electrophoresis, Polyacrylamide Gel; Guanine; Nucleic Acid Conformation; Nucleotides; Oligonucleotides; Pyrimidines; Tandem Repeat Sequences; Temperature	2003
The nucleic acids of some insect viruses. The Journal of general physiology, 1952, Volume: 36, Issue:2 Topics: Adenine; Cytosine; DNA; Guanine; Insect Viruses; Nucleic Acids; Purines; Pyrimidines; Thymine; Viruses	1952
The incorporation of the pyrimidine ring of adenine into the isoalloxazine ring of riboflavin. The Journal of biological chemistry, 1956, Volume: 219, Issue:1 Topics: Adenine; Flavins; Fungi; Pyrimidines; Riboflavin	1956
Studies of the mechanism of action of urethane in initiating pulmonary adenomas in mice. II. Its relation to nucleic acid synthesis. The Journal of experimental medicine, 1957, Apr-01, Volume: 105, Issue:4 Topics: Adenine; Adenoma; Animals; DNA; Lung Neoplasms; Mice; Neoplasms; Nucleic Acids; Orotic Acid; Pyrimidines; RNA; Thymine; Urethane	1957
Studies on 4-aminopyrazolo (3,4-d) pyrimidine: reversal of cellular damage in the HeLa strain. Texas reports on biology and medicine, 1958, Volume: 16, Issue:4 Topics: Adenine; Antineoplastic Agents; HeLa Cells; Humans; Pyrimidines; Tissue Culture Techniques	1958
Reversal of adenine toxicity by pyrimidine mucleosides. Biochimica et biophysica acta, 1961, Feb-12, Volume: 47 Topics: Adenine; Nucleosides; Nucleotides; Pyrimidines	1961
Effects of 4-aminopyrazolo (3,4-d)pyrimidine and 1-methyl-4-aminopyrazolo(3,4-d)pyrimidine on nucleic acid purine metabolism in ascites tumors. Cancer research, 1961, Volume: 21 Topics: Adenine; Ascites; Neoplasms; Nucleic Acids; Purines; Pyrimidines	1961
The metabolism of 4-aminopyrazolo(3,4-d)pyrimidine in normal and neoplastic tissues. Cancer research, 1961, Volume: 21 Topics: Adenine; Neoplasms; Pyrimidines	1961
POTENTIAL PURINE ANTAGONISTS. 32. THE SYNTHESIS AND ANTITUMOR ACTIVITY OF CERTAIN COMPOUNDS RELATED TO 4-AMINOPYRAZOLO(3,4-D)PYRIMIDINE. Journal of medicinal and pharmaceutical chemistry, 1962, Volume: 5 Topics: Adenine; Adenocarcinoma; Antineoplastic Agents; Chemical Phenomena; Chemistry; Pharmacology; Purines; Pyrazoles; Pyrimidines; Research	1962
INTERACTION OF PURINES WITH THE PYRIMIDINE TRANSPORT PROCESS OF THE SMALL INTESTINE. Biochemical pharmacology, 1963, Volume: 12 Topics: Adenine; Caffeine; Carbon Isotopes; Guanine; Intestine, Small; Intestines; Mercaptopurine; Pharmacology; Physiology; Purines; Pyrimidines; Rats; Research; Theobromine; Theophylline; Uracil; Uric Acid; Xanthines	1963
[SEMI-CONDUCTIBILITY OF DNA (DESOXYRIBONUCLEIC ACID) AND OF PURINE AND PYRIMIDINE BASES OF DNA AND RNA (RIBONUCLEIC ACID)]. Comptes rendus hebdomadaires des seances de l'Academie des sciences, 1963, Dec-23, Volume: 257 Topics: Adenine; Cytosine; DNA; Electrophysiology; Guanine; Purines; Pyrimidines; Research; RNA; Thymine; Uracil	1963
STUDIES ON THE ACTIONS OF PYRAZOLOPYRIMIDINES IN MICROORGANISMS. I. 4-HYDROXY-6-AMINOPYRAZOLOPYRIMIDINE. Experimental cell research, 1964, Volume: 33 Topics: Adenine; Antimetabolites; Bacillus cereus; Carbon Isotopes; Culture Media; Escherichia coli; Formates; Guanine; Methionine; Mutation; Pharmacology; Phosphates; Phosphorus Isotopes; Purines; Pyrazoles; Pyrimidines; Research; RNA; RNA, Bacterial	1964
STUDIES ON THE ACTIONS OF PYRAZOLOPYRIMIDINES IN MICROORGANISMS. II. 4-AMINOPYRAZOLOPYRIMIDINE. Experimental cell research, 1964, Volume: 33 Topics: Acetates; Adenine; Antimetabolites; Bacillus cereus; Carbon Isotopes; Escherichia coli; Formates; Glycine; Guanine; Histidine; Leucine; Methionine; Nucleosides; Pharmacology; Phosphates; Phosphorus Isotopes; Pimelic Acids; Proteins; Purines; Pyrazoles; Pyrimidines; Research; Uracil	1964
[THE COMPLEX CHEMICAL BEHAVIOR OF PYRIMIDINE DERIVATIVES. III. THE COMPLEX CHEMICAL BEHAVIOR OF ADENINE TOWARDS COPPER(II)]. Hoppe-Seyler's Zeitschrift fur physiologische Chemie, 1963, Volume: 333 Topics: Adenine; Chemistry Techniques, Analytical; Copper; Hydrogen-Ion Concentration; Pyrimidines; Research	1963
[ON MOBILITY OF PURINES AND PYRIMIDINE BASES AND THEIR DERIVATIVES DURING ELECTROPHORETIC SEPARATION]. Laboratornoe delo, 1964, Volume: 10 Topics: Adenine; Adenine Nucleotides; Cytosine Nucleotides; Electrophoresis; Guanine; Nucleosides; Nucleotides; Purines; Pyrimidines; Research; Thymidine; Thymine; Uracil	1964
STUDIES ON THE ANALYSIS OF PURINE AND PYRIMIDINE BASES OF NUCLEIC ACID. III. A DIRECT SPECTROPHOTOMETRIC METHOD FOR THE ANALYSIS OF THE PURINE AND PYRIMIDINE BASES IN DNA. Scientia Sinica, 1964, Volume: 13 Topics: Adenine; Cytosine; DNA; Guanine; Nucleic Acids; Purines; Pyrimidines; Spectrophotometry; Thymine	1964
REGULATION AND COORDINATION OF PURINE AND PYRIMIDINE BIOSYNTHESES IN YEAST. I. REGULATION OF PURINE BIOSYNTHESIS AND ITS RELATION TO TRANSIENT CHANGES IN INTRACELLULAR NUCLEOTIDE LEVELS. Biophysical journal, 1964, Volume: 4 Topics: Adenine; Carbon Isotopes; Metabolism; Nucleotides; Purines; Pyrimidines; Research; Ribonucleotides; Saccharomyces; Saccharomyces cerevisiae	1964
FORMATION OF RIBOMONONUCLEOTIDES FROM PURINE AND PYRIMIDINE BASES AND 5'-PHOSPHORIBOSYLPYROPHOSPHATE BY A SALMON MILT EXTRACT. Canadian journal of biochemistry, 1964, Volume: 42 Topics: Adenine; Adenine Nucleotides; Animals; Carbon Isotopes; Chromatography; Cytosine; Cytosine Nucleotides; Diphosphates; Fishes; Guanine; Guanine Nucleotides; Metabolism; Nucleotides; Orotic Acid; Phosphoribosyl Pyrophosphate; Purines; Pyrimidines; Research; Salmon; Thymine; Tissue Extracts; Tritium; Uracil; Uracil Nucleotides; Xanthines	1964
[ON THE ACTION OF CERTAIN PURINE AND PYRIMIDINE BASES ON THE INDUCTION OF LYSIS INDUCED BY IRRADIATION OF CULTURES OF LYSOGENIC ESCHERICHIA COLI BY ULTRAVIOLET RAYS AND ON SOME ELECTRONIC ASPECTS OF THIS ACTION]. Comptes rendus hebdomadaires des seances de l'Academie des sciences, 1964, Aug-31, Volume: 259 Topics: Adenine; Bacteriolysis; Cytosine; Escherichia coli; Pharmacology; Purines; Pyrimidines; Radiation Effects; Research; Thymine; Ultraviolet Rays	1964
[INFLUENCE OF THE HYDROGEN BOND ON THE DIPOLAR MOMENT OF PURINE-PYRIMIDINE PAIRS OF NUCLEIC ACIDS]. Comptes rendus hebdomadaires des seances de l'Academie des sciences, 1964, Oct-19, Volume: 259 Topics: Acetates; Adenine; Amines; Biochemical Phenomena; Biochemistry; Cytosine; Guanine; Hydrogen; Nucleic Acids; Purines; Pyridines; Pyrimidines; Research; Thymine	1964
[ON THE SEMI-CONDUCTIVITY OF PURINE AND PYRIMIDINE BASES OF NUCLEIC ACIDS]. Comptes rendus hebdomadaires des seances de l'Academie des sciences, 1964, Nov-02, Volume: 259 Topics: Adenine; Chemical Phenomena; Chemistry, Physical; Cytosine; Guanine; Nucleic Acids; Purines; Pyrimidines; Research; Thymine; Uracil	1964
INTERMOLECULAR FORCES IN ASSOCIATION OF PURINES WITH POLYBENZENOID HYDROCARBONS. Science (New York, N.Y.), 1965, Mar-12, Volume: 147, Issue:3663 Topics: Adenine; Benzopyrenes; Caffeine; Chemical Phenomena; Chemistry; Cytosine; Guanine; Hypoxanthines; London; Purines; Pyrimidines; Research; Thymine; Uracil; Uric Acid; Xanthines	1965
MODE OF ACTION OF ADENINE, URIDINE AND CYTIDINE NUCLEOTIDES AND 2,6-BIS(DIETHANOLAMINO)-4,8-DIPIPERIDINO-PYRIMIDINO(5,4-D)PYRIMIDINE ON THE CORONARY, RENAL AND FEMORAL ARTERIES. Arzneimittel-Forschung, 1964, Volume: 14 Topics: Adenine; Adenine Nucleotides; Animals; Coronary Vessels; Cytidine; Cytosine Nucleotides; Dipyridamole; Dogs; Femoral Artery; Heart; Kidney; Nucleotides; Pharmacology; Pyrimidines; Renal Artery; Research; Uracil Nucleotides; Uridine	1964
[SYNTHESIS OF PYRIMIDINE AND PURINE BASES. I. SYNTHESIS OF ADENINE FROM MALONIC ESTER. (1)]. Yakugaku zasshi : Journal of the Pharmaceutical Society of Japan, 1965, Volume: 85 Topics: Adenine; Chemical Phenomena; Chemistry; Esters; Malonates; Pyrimidines; Research	1965
[SYNTHESIS OF PYRIMIDINE AND PURINE BASES. II. SYNTHESIS OF ADENINE FROM MALONIC ESTER. (2)]. Yakugaku zasshi : Journal of the Pharmaceutical Society of Japan, 1965, Volume: 85 Topics: Adenine; Chemical Phenomena; Chemistry; Esters; Malonates; Pyrimidines; Research	1965
Clear distinction of pyrimidine bases on the complementary strand by fluorescence change of novel fluorescent nucleosides. Nucleic acids research. Supplement (2001), 2003, Issue:3 Topics: Adenine; Base Sequence; Fluorescent Dyes; Inosine; Nucleosides; Oligodeoxyribonucleotides; Pyrimidines; Spectrometry, Fluorescence	2003
Purine and pyrimidine contents of some desoxypentose nucleic acids. The Journal of general physiology, 1950, May-20, Volume: 33, Issue:5 Topics: Adenine; Animals; Cattle; Cytosine; Guanine; Horses; Nucleic Acids; Purines; Pyrimidines; Sheep; Thymine	1950
8-OxoA inhibits the incision of an AP site by the DNA glycosylases Fpg, Nth and the AP endonuclease HAP1. Radiation research, 2005, Volume: 163, Issue:1 Topics: Adenine; Base Sequence; Deoxyribonuclease (Pyrimidine Dimer); DNA; DNA Damage; DNA-(Apurinic or Apyrimidinic Site) Lyase; DNA-Formamidopyrimidine Glycosylase; Escherichia coli Proteins; Molecular Sequence Data; Purines; Pyrimidines; Radiation Dosage; Structure-Activity Relationship	2005
Insight into the CSA tensors of nucleobase carbons in RNA polynucleotides from solution measurements of residual CSA: towards new long-range orientational constraints. Journal of magnetic resonance (San Diego, Calif. : 1997), 2006, Volume: 179, Issue:2 Topics: Adenine; Anisotropy; Carbon Isotopes; Molecular Conformation; Molecular Structure; Nitrogen Isotopes; Nuclear Magnetic Resonance, Biomolecular; Polynucleotides; Purines; Pyrimidines; RNA; Solutions	2006
Thermodynamic and kinetic characterization of ligand binding to the purine riboswitch aptamer domain. Journal of molecular biology, 2006, Jun-09, Volume: 359, Issue:3 Topics: 2-Aminopurine; 5' Untranslated Regions; Adenine; Aptamers, Nucleotide; Guanine; Ligands; Models, Molecular; Mutation; Nucleic Acid Conformation; Purines; Pyrimidines; Regulatory Sequences, Ribonucleic Acid; RNA, Bacterial; Thermodynamics	2006
Ion-induced biomolecular radiation damage: from isolated nucleobases to nucleobase clusters. Chemphyschem : a European journal of chemical physics and physical chemistry, 2006, Nov-13, Volume: 7, Issue:11 Topics: Adenine; Base Composition; Biophysics; Chemistry, Physical; DNA; Electrons; Hydrogen Bonding; Ions; Mass Spectrometry; Molecular Conformation; Purines; Pyrimidines; Spectrophotometry; Thymine; Uracil	2006
Modified pyrimidines specifically bind the purine riboswitch. Journal of the American Chemical Society, 2006, Nov-08, Volume: 128, Issue:44 Topics: Adenine; Base Pairing; Binding Sites; Crystallography, X-Ray; Guanine; Nucleic Acid Conformation; Purines; Pyrimidines; Regulatory Sequences, Ribonucleic Acid; Ribosomes	2006
Synthesis and characterization of some pyrimidine, purine, amino acid and mixed ligand complexes. Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 2008, Volume: 69, Issue:1 Topics: Adenine; Amino Acids; Barbital; Electrons; Ligands; Magnetics; Metals; Purines; Pyrimidines; Spectrophotometry, Infrared; Thiouracil	2008
Detailed dynamics of the nonradiative deactivation of adenine: a semiclassical dynamics study. The journal of physical chemistry. A, 2008, Sep-18, Volume: 112, Issue:37 Topics: Adenine; Computer Simulation; Models, Chemical; Pyrimidines; Quantum Theory; Time Factors; Vibration	2008
Replication through an abasic DNA lesion: structural basis for adenine selectivity. The EMBO journal, 2010, May-19, Volume: 29, Issue:10 Topics: Adenine; Amino Acid Motifs; Amino Acid Sequence; Catalytic Domain; DNA; DNA Damage; DNA Replication; DNA-Directed DNA Polymerase; Humans; Kinetics; Molecular Conformation; Molecular Sequence Data; Mutation; Protein Structure, Secondary; Pyrimidines; Sequence Homology, Amino Acid; Substrate Specificity; Tyrosine; X-Rays	2010
A bio-metal-organic framework for highly selective CO(2) capture: A molecular simulation study. ChemSusChem, 2010, Aug-23, Volume: 3, Issue:8 Topics: Adenine; Adsorption; Carbon Dioxide; Carbon Sequestration; Hydrogen; Lewis Bases; Metals; Models, Molecular; Molecular Conformation; Nitrogen; Organic Chemicals; Porosity; Pyrimidines; Water	2010
De novo pyrimidine nucleotide synthesis mainly occurs outside of plastids, but a previously undiscovered nucleobase importer provides substrates for the essential salvage pathway in Arabidopsis. The Plant cell, 2012, Volume: 24, Issue:4 Topics: Adenine; Amino Acid Sequence; Arabidopsis; Arabidopsis Proteins; Biosynthetic Pathways; Brassica; Carbonyl Cyanide m-Chlorophenyl Hydrazone; Gene Expression Regulation, Plant; Green Fluorescent Proteins; Guanine; Intracellular Membranes; Models, Biological; Molecular Sequence Data; Nucleobase Transport Proteins; Nucleotides; Plastids; Protein Transport; Protoplasts; Pyrimidines; Recombinant Fusion Proteins; RNA, Messenger; Sequence Alignment; Sodium Chloride; Substrate Specificity; Symporters; Time Factors; Uracil	2012
Studies on 4-aminopyrazolo (3,4-d) pyrimidine: structural relationships among inhibiting and relieving agents in Neurospora. Antibiotics & chemotherapy (Northfield, Ill.), 1957, Volume: 7, Issue:7 Topics: Adenine; Antineoplastic Agents; Neurospora; Pyrimidines	1957
Studies on 4-aminopyrazolo(3,4-d)pyrimidine: action of derivatives and analogues on hela cells. Antibiotics & chemotherapy (Northfield, Ill.), 1959, Volume: 9, Issue:6 Topics: Adenine; HeLa Cells; Humans; Pyrimidines; Tissue Culture Techniques	1959
Differential nucleobase protection against 5-fluorouracil toxicity for squamous and columnar cells: implication for tissue function and oncogenesis. Investigational new drugs, 2015, Volume: 33, Issue:5 Topics: Adenine; Carcinogenesis; Cell Line, Tumor; DNA Replication; Epithelial Cells; Esophagus; Fluorouracil; Gastric Mucosa; Gene Expression; Humans; Nucleobase Transport Proteins; Protective Agents; Pyrimidines; RNA, Messenger; Uracil	2015
Determinants of Photolyase's DNA Repair Mechanism in Mesophiles and Extremophiles. Journal of the American Chemical Society, 2018, 02-28, Volume: 140, Issue:8 Topics: Adenine; Deoxyribodipyrimidine Photo-Lyase; Dinitrocresols; DNA Repair; Models, Molecular; Pyrimidines	2018
Ligand Binding Mechanism and Its Relationship with Conformational Changes in Adenine Riboswitch. International journal of molecular sciences, 2020, Mar-11, Volume: 21, Issue:6 Topics: Adenine; Bacterial Proteins; Guanine; Ligands; Models, Molecular; Molecular Dynamics Simulation; Mutation; Nucleic Acid Conformation; Purines; Pyrimidines; Riboswitch	2020