解剖学和形态学
麻醉学
听力与言语-语言病理学
行为科学
心脏和心血管系统
细胞和组织工程学
临床神经病学
危重症监护医学
牙科,口腔外科和医学
皮肤病学
急诊医学
内分泌学和新陈代谢
肠胃学和肝脏学
老人病学和老年医学
卫生保健科学和服务
血液学
免疫学
传染病
综合和补充性医学
医学伦理学
医学信息学
医学实验室技术
医学,全科和内科
医学,法律
医学,研究和试验
神经系统科学
护理
营养学和饮食学
产科医学和妇科医学
肿瘤学
眼科学
整形外科学
耳鼻喉科学
病理学
儿科学
周围血管疾病
药理学和药剂学
生理学
基本医疗保健
精神病学
公共、环境和职业卫生
放射学,核医学和医学成像
康复学
生殖生物学
呼吸系统
风湿病学
运动科学
外科学
毒理学
热带医学
泌尿学和肾脏学
病毒学
老年医学
健康政策和服务
心理学,临床
abstract::A solution of benzenesulphonic acid (3%, w/v) in a dimethylformamide and dichloromethane mixture (9:1, v/v) is shown to be a very effective reagent for the detritylation of deoxyoligonucleotides attached to a solid support. The levels of depurination with this reagent were lower than those observed with other reagents...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.18.5605
更新日期:1982-09-25 00:00:00
abstract::The beta-globin gene of a patient with mRNA-deficient beta o-thalassemia has been sequenced. We find a single nucleotide deletion in amino acid codon 44 that produces a UGA terminator at codon 60. We have previously shown that the beta-globin mRNA of this patient is correctly spliced and polyadenylated, but rapidly tu...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.18.5421
更新日期:1982-09-25 00:00:00
abstract::A cell-free extract of yeast nuclei that can specifically transcribe cloned yeast 5S rRNA genes has been developed. Optima for transcription of 5S rDNA were determined and conditions of extract preparation leading to reproducible activities and specificities established. The major in vitro product has the same size an...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.17.5223
更新日期:1982-09-11 00:00:00
abstract::Prostatic steroid binding protein, whose expression is stimulated by androgens, consists of two subunits: one containing the polypeptides C1 and C3 and the other containing C2 and C3. We have characterised genomic clones containing the C1 and C2 genes by restriction enzyme analysis and DNA sequencing. Both genes are 3...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.17.5121
更新日期:1982-09-11 00:00:00
abstract::We present the preparation of an ion exchange paper which can be used as a solid carrier in the transfer of RNA from gels. In addition to detection by blot hybridization to specific probes, transferred RNA can be characterized by cell-free translation in situ. Preparation of the paper is simple, inexpensive and reprod...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.16.4831
更新日期:1982-08-25 00:00:00
abstract::Insertion of the insertion sequence Is2(I) directly before the galE gene of the galactose operon results in a Gal minus phenotype (1, 2). The Gal-constitutive allele galc200 (and its deletion derivative galc200 delta 31) arise from such a Gal minus mutant by the insertion of LS2(II) DNA within the LS2(I) sequence (3)....
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.16.5015
更新日期:1982-08-25 00:00:00
abstract::The DNA sequences at and around the junctions between viral and cellular DNA in the polyoma virus transformed mouse cell line, TS-A-3T3, have been determined. No common sequence specificity or structural features at the joins have been observed. The sequence indicates that the 94K truncated large T antigen found in TS...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.15.4515
更新日期:1982-08-11 00:00:00
abstract::The "ovalbumin Y" gene, one of three which constitute the ovalbumin gene family in chicken has been completely sequenced. The exact location of exons can be derived from the comparison with the ovalbumin gene sequence and from the map previously established by electron microscopy analysis. During evolution of the Y ge...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.14.4363
更新日期:1982-07-24 00:00:00
abstract::A mass culture of human diploid fibroblasts, and eight clones isolated from that mass culture, were examined for methylation patterns in several regions of DNA. Plasmid-inserted cDNA sequences were used as probes for alpha-hCG, beta-globin, A gamma- and G gamma-globin, and beta- and gamma-actin gene regions. Each prob...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.14.4293
更新日期:1982-07-24 00:00:00
abstract::Three clones of non-repetitive sequences and six clones containing repetitive sequences were obtained from micronuclear DNA of Tetrahymena thermophila. All the non-repetitive and three repetitive sequences had the same organization in micro- and macronuclear DNAs as revealed by blot hybridization. On the other hand, t...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.14.4279
更新日期:1982-07-24 00:00:00
abstract::The primary structure of the E. coli rpoC gene (5321 base pairs) coding the beta'-subunit of RNA polymerase as well as its adjacent segment have been determined. The structure analysis of the peptides obtained by cleavage of the protein with cyanogen bromide and trypsin has confirmed the amino acid sequence of the bet...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.13.4035
更新日期:1982-07-10 00:00:00
abstract::Ovarian poly (A) + RNA from Xenopus laevis and Xenopus borealis was used to construct two cDNA libraries which were screened for histone sequences. cDNA clones to H4 mRNA were obtained from both species and an H3 cDNA clone from Xenopus laevis. The complete DNA sequences of these clones have been determined and are pr...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.12.3769
更新日期:1982-06-25 00:00:00
abstract::A newly discovered group of spherical plant viruses contains a bipartite genome consisting of a single-strand linear RNA molecule (RNA 1, Mr 1.5 x 10(6) ), and a single-strand, covalently closed circular viroid-like RNA molecule (RNA 2, Mr approximately 125,000). The nucleotide sequences of the RNA 2 of two of these, ...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.12.3681
更新日期:1982-06-25 00:00:00
abstract::The replication origin region of the Escherichia coli K-12 chromosome has been cloned, and a region of 245 base-pairs has been shown to contain all the information for autonomous replication (defined ori). In order to obtain further information on the sequence organization in the defined ori stretch, various types of ...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.12.3745
更新日期:1982-06-25 00:00:00
abstract::dITP may be generated from dATP by a slow, nonenzymatic hydrolysis. While [3H]dITP was degraded rapidly to [3H]deoxyinosine by HeLa cell nuclear extracts, no net degradation of [3H]dITP was observed in the presence of physiological concentrations of ATP, apparently because the extract contained deoxynucleoside diphosp...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.12.3693
更新日期:1982-06-25 00:00:00
abstract::Cloned DNA from the EcoRI J fragment of EBV has been used as template for in vitro transcription experiments using cell-free extracts prepared from HeLa or KB cells. Two EBV specific RNAs each about 175 bases in length were synthesised and nuclease 51 mapping experiments determined that these in vitro products corresp...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.11.3407
更新日期:1982-06-11 00:00:00
abstract::KpnI restriction of DNAs from all anthropoid primates studied releases a conspicuous series of segments representing families of long, interspersed repetitive DNAs termed here the KpnI 1.2, 1.5, 1.8 and 1.9 kb families. Human KpnI 1.2 to 1.9 kb segments representative of these families were isolated and separately clo...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.10.3175
更新日期:1982-05-25 00:00:00
abstract::This paper describes a computer program designed to look for similarities between pairs of nucleic or amino acid sequences. The program looks both for segments of perfect identity or for regions where, using a scoring matrix, a minimum value is exceeded. The results of comparisons are presented as a matrix which is di...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.9.2951
更新日期:1982-05-11 00:00:00
abstract::The entire intervening sequence of Tetrahymena thermophila ribosomal DNA has been determined. It is 413 nucleotides long and has the same splice junctions as those in T. pigmentosa. There is 93% homology between the intervening sequences in the two species, and 100% homology between their adjacent 26S RNA coding regio...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.9.2809
更新日期:1982-05-11 00:00:00
abstract::The thermal stability of the Tn10 encoded tetracycline resistance (TET) gene control region is investigated by melting studies using purified DNA restriction fragments containing various amounts of flanking sequences. In order to study the thermodynamic properties of this control region under conditions, where enough ...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.8.2685
更新日期:1982-04-24 00:00:00
abstract::Analyses of secondary structures proposed for ribosomal RNA's show that, of the different kinds of base pairs directly adjoining the ends of postulated double-helical regions, only A-G with A at the 5' end significantly exceeds the number expected for a random base distribution. An A(syn)-G(trans) hydrogen-bonded base...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.8.2701
更新日期:1982-04-24 00:00:00
abstract::The effect of UV-irradiation on the conversion of the single-stranded DNA of the parvovirus Minute-Virus-of-Mice (MVM) to duplex Replicative Forms (RF) was studied after infection of mouse A9 fibroblasts. UV-irradiation of the virus prior to infection of unirradiated cells resulted in a dose-dependent, single-hit, inh...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.8.2577
更新日期:1982-04-24 00:00:00
abstract::A peculiar phenomenon is observed in several adenovirus type 2 or 5 (Ad2 or Ad5) transformed cell lines: the right hand and left hand terminal regions of the viral genome present in the viral DNA insertions of these cell lines are found to be linked together. A large part of the viral DNA insertion present in the Ad5 ...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.7.2189
更新日期:1982-04-10 00:00:00
abstract::We have sequenced the external transcribed spacer (ETS) of a ribosomal transcription unit from Xenopus laevis, together with sections of the preceding non-transcribed spacer. Our analysis was carried out on the same cloned transcription unit as that from which the internal transcribed spacers (ITS) were previously seq...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.7.2387
更新日期:1982-04-10 00:00:00
abstract::The G- and U-specific reagent, carbodiimide was used to probe the solution structure of aminoacylated yeast phenylalanine tRNA. Both quantitative and qualitative changes in modification were observed when the modification patterns of tRNA-CCA(3'OH), tRNA-CCA(3'NH2) and phe-tRNA-CCA(3'NH2) were compared. Five nucleotid...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.7.2419
更新日期:1982-04-10 00:00:00
abstract::The 4.5S rRNA was isolated from the chloroplast ribosomes from Dryopteris acuminata. The complete nucleotide sequence was determined to be: OHUAAGGUCACGGCAAGACGAGCCGUUUAUCACCACGAUAGGUGCUAAGUGGAGGUGCAGUAAUGUAUGCAGCUGAGGC AUCCUAAUAGACCGAGAGGUUUGAACOH. The 4.5S rRNA is composed of 103 nucleotides and shows strong homolog...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.7.2257
更新日期:1982-04-10 00:00:00
abstract::A previously elaborated technique for fixing a chosen partially melted state of DNA with glyoxal was used in a study of the melting process of the replicative form (RF III) of phi X174 DNA. Electron-microscopic maps corresponding to five points of the melting curve of RF III were obtained and compared with the theoret...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.6.1867
更新日期:1982-03-25 00:00:00
abstract::We describe improve enzymatic methods for sequencing method for sequencing DNA. They are based on partial digestion of duplex DNA with exonuclease III to produce DNA molecules with 3' ends shortened to varying lengths, followed by repair synthesis to extend and label the 3' ends. After asymmetrical cleavage of the DNA...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.6.2065
更新日期:1982-03-25 00:00:00
abstract::The resonance Raman spectrum of native DNA has been obtained using excitation at 257 nm. In a first part, the spectral lines are assigned to the different nucleotide bases which provide the resonance effect. In a second part, the interactions of DNA with basic peptides (Arginine Methylester, Lysine Methylester, Arginy...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.5.1707
更新日期:1982-03-11 00:00:00
abstract::The cells of the bronchial epithelium of man are targets for benzo(a)pyrene carcinogenesis. When cultures of these cells, and of non-target fibroblasts, are exposed to [3H]-benzo(a)pyrene, we find that the epithelial cells metabolise and bind to DNA far greater amounts of benzpyrene than do fibroblasts. By analysis of...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.5.1547
更新日期:1982-03-11 00:00:00
abstract::The crp gene of E. coli, which codes for cAMP receptor protein (CRP), has been cloned in the plasmid pBR322 on the basis of a genetic complementation. One of the recombinant plasmids, pHA1, was shown to direct the synthesis of CRP in a cell-free system. The location of the crp gene was determined by constructing subcl...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.4.1345
更新日期:1982-02-25 00:00:00
abstract::A DNA copy of influenza A/NT/60/68 viral RNA segment 2, corresponding to protein P1, has been cloned in the E.coli plasmid pBr322. The clone is 2341 nucleotides long and represents a full-length copy of the viral RNA. In the viral complementary (plus sense) strand there is an open reading frame that is 2271 nucleotide...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.4.1335
更新日期:1982-02-25 00:00:00
abstract::Details of polynucleotide flexibility may be probed through a combination of semiempirical potential energy calculations and statistical mechanical analyses. The pseudorotational motions of the furanose and the long-range correlated rotations of the chain backbone are described briefly here. ...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.3.777
更新日期:1982-02-11 00:00:00
abstract::A lac promotor mutant was constructed by filling in the protruding ends of the HpaII site located within the lac promotor. The mutation, named M42, is a two base pair insertion that changes the distance between the -10 and -35 regions from 18 to 20 residues. The activity of the mutant promotor measured in vivo is 15% ...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.3.903
更新日期:1982-02-11 00:00:00
abstract::The early DNa products of reverse transcription have been analyzed from reconstructed reactions containing avian myeloblastosis virus 35S RNA . tRNAtrp complex and highly purified reverse transcriptase. We describe conditions for the synthesis of genome-length complementary DNA and two discrete species of plus strand ...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.3.1009
更新日期:1982-02-11 00:00:00
abstract::In an extensive analysis, using a range of restriction endonucleases, HinfI and TaqI were found to differentiate satellites I, II and III & IV. Satellite I is resistant to digestion by TaqI, but is cleaved by HinfI to yield three major fragments of approximate size 770, 850 and 950bp, associated in a single length of ...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.2.547
更新日期:1982-01-22 00:00:00
abstract::To synchronize SV40 replicons, simian cells infected with a tsA mutant were restricted at 40 degrees, to complete ongoing replication and returned to 32 degrees, to activate new replicons in the presence of the DNA chain elongation inhibitor aphidicolin. Upon further incubation at 40 degrees without the drug, 3H-dT wa...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.2.763
更新日期:1982-01-22 00:00:00
abstract::A novel method of determining the number of superhelical turns of a covalently-closed plasmid DNA is described. It relies on the determination of the hyperchromicity, and hence the proportion of unstacked basepairs, of a partially heat-denatured sample which co-migrates during electrophoresis with nicked circular dupl...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.2.525
更新日期:1982-01-22 00:00:00
abstract::A frequently used method of comparing large RNA molecules employs the two-dimensional display of oligonucleotides generated through the action of specific RNases (oligonucleotide mapping, fingerprinting). Using computer simulations and simple analytic expressions the number of large RNase T1-resistant oligonucleotides...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.1.237
更新日期:1982-01-11 00:00:00
abstract::A set of programs is presented for the reconstruction of a DNA sequence from data generated by the M13 shotgun sequencing technique. Once the sequence has been established and stored other programs are used for its analysis. The programs have been written for the Apple II microcomputer. A minimum investment is require...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/10.1.39
更新日期:1982-01-11 00:00:00