메뉴 건너뛰기




Volumn 6, Issue 1, 2011, Pages

The mitochondrial genome of the legume vigna radiata and the analysis of recombination across short mitochondrial repeats

Author keywords

[No Author keywords available]

Indexed keywords

DNA FRAGMENT; RIBOSOME RNA; TRANSFER RNA;

EID: 79251638682     PISSN: None     EISSN: 19326203     Source Type: Journal    
DOI: 10.1371/journal.pone.0016404     Document Type: Article
Times cited : (140)

References (49)
  • 1
    • 77952837838 scopus 로고    scopus 로고
    • Insights into the evolution of mitochondrial genome size from complete sequences of Citrullus lanatus and Cucurbita pepo (Cucurbitaceae)
    • Alverson AJ, Wei XX, Rice DW, Stern DB, Barry K, et al. (2010) Insights into the evolution of mitochondrial genome size from complete sequences of Citrullus lanatus and Cucurbita pepo (Cucurbitaceae). Molecular Biology and Evolution 27: 1436-1448.
    • (2010) Molecular Biology and Evolution , vol.27 , pp. 1436-1448
    • Alverson, A.J.1    Wei, X.X.2    Rice, D.W.3    Stern, D.B.4    Barry, K.5
  • 2
    • 35548984339 scopus 로고    scopus 로고
    • Comparisons among two fertile and three male-sterile mitochondrial genomes of maize
    • Allen JO, Fauron CM, Minx P, Roark L, Oddiraju S, et al. (2007) Comparisons among two fertile and three male-sterile mitochondrial genomes of maize. Genetics 177: 1173-1192.
    • (2007) Genetics , vol.177 , pp. 1173-1192
    • Allen, J.O.1    Fauron, C.M.2    Minx, P.3    Roark, L.4    Oddiraju, S.5
  • 3
    • 0021768590 scopus 로고
    • The physical map and organisation of the mitochondrial genome from the fertile cytoplasm of maize
    • Lonsdale DM, Hodge TP, Fauron CM (1984) The physical map and organisation of the mitochondrial genome from the fertile cytoplasm of maize. Nucleic Acids Res 12: 9249-9261.
    • (1984) Nucleic Acids Res , vol.12 , pp. 9249-9261
    • Lonsdale, D.M.1    Hodge, T.P.2    Fauron, C.M.3
  • 4
    • 0021264854 scopus 로고
    • Tripartite structure of the Brassica campestris mitochondrial genome
    • Palmer JD, Shields CR (1984) Tripartite structure of the Brassica campestris mitochondrial genome. Nature 307: 437-440.
    • (1984) Nature , vol.307 , pp. 437-440
    • Palmer, J.D.1    Shields, C.R.2
  • 5
    • 0024259002 scopus 로고
    • Plant mitochondrial DNA evolves rapidly in structure, but slowly in sequence
    • Palmer JD, Herbon LA (1989) Plant mitochondrial DNA evolves rapidly in structure, but slowly in sequence. Journal of Molecular Evolution 28: 87-97.
    • (1989) Journal of Molecular Evolution , vol.28 , pp. 87-97
    • Palmer, J.D.1    Herbon, L.A.2
  • 6
    • 33745809847 scopus 로고    scopus 로고
    • The Owen mitochondrial genome in sugar beet (Beta vulgaris L.): Possible mechanisms of extensive rearrangements and the origin of the mitotype-unique regions
    • Satoh M, Kubo T, Mikami T (2006) The Owen mitochondrial genome in sugar beet (Beta vulgaris L.): possible mechanisms of extensive rearrangements and the origin of the mitotype-unique regions. Theoretical and Applied Genetics 113: 477-484.
    • (2006) Theoretical and Applied Genetics , vol.113 , pp. 477-484
    • Satoh, M.1    Kubo, T.2    Mikami, T.3
  • 7
    • 71549141989 scopus 로고    scopus 로고
    • Diversity of the Arabidopsis mitochondrial genome occurs via nuclear-controlled recombination activity
    • Arrieta-Montiel MP, Shedge V, Davila J, Christensen AC, Mackenzie SA (2009) Diversity of the Arabidopsis mitochondrial genome occurs via nuclear-controlled recombination activity. Genetics 183: 1261-1268.
    • (2009) Genetics , vol.183 , pp. 1261-1268
    • Arrieta-Montiel, M.P.1    Shedge, V.2    Davila, J.3    Christensen, A.C.4    Mackenzie, S.A.5
  • 8
    • 0034235831 scopus 로고    scopus 로고
    • The complete nucleotide sequence of the mitochondrial genome of sugar beet (Beta vulgaris L.) reveals a novel gene for tRNA(Cys)(GCA)
    • Kubo T, Nishizawa S, Sugawara A, Itchoda N, Estiati A, et al. (2000) The complete nucleotide sequence of the mitochondrial genome of sugar beet (Beta vulgaris L.) reveals a novel gene for tRNA(Cys)(GCA). Nucleic Acids Research 28: 2571-2576.
    • (2000) Nucleic Acids Research , vol.28 , pp. 2571-2576
    • Kubo, T.1    Nishizawa, S.2    Sugawara, A.3    Itchoda, N.4    Estiati, A.5
  • 9
    • 8644286140 scopus 로고    scopus 로고
    • The cytoplasmic male-sterile type and normal type mitochondrial genomes of sugar beet share the same complement of genes of known function but differ in the content of expressed ORFs
    • Satoh M, Kubo T, Nishizawa S, Estiati A, Itchoda N, et al. (2004) The cytoplasmic male-sterile type and normal type mitochondrial genomes of sugar beet share the same complement of genes of known function but differ in the content of expressed ORFs. Molecular Genetics and Genomics 272: 247-256.
    • (2004) Molecular Genetics and Genomics , vol.272 , pp. 247-256
    • Satoh, M.1    Kubo, T.2    Nishizawa, S.3    Estiati, A.4    Itchoda, N.5
  • 10
    • 0034787717 scopus 로고    scopus 로고
    • A major deletion in the cucumber mitochondrial genome sorts with the MSC phenotype
    • Lilly JW, Bartoszewski G, Malepszy S, Havey MJ (2001) A major deletion in the cucumber mitochondrial genome sorts with the MSC phenotype. Current Genetics 40: 144-151.
    • (2001) Current Genetics , vol.40 , pp. 144-151
    • Lilly, J.W.1    Bartoszewski, G.2    Malepszy, S.3    Havey, M.J.4
  • 11
    • 0032977907 scopus 로고    scopus 로고
    • Heteroplasmy and homoplasmy for maize mitochondrial mutants: A rare homoplasmic nad4 deletion mutant plant
    • Yamato KT, Newton KJ (1999) Heteroplasmy and homoplasmy for maize mitochondrial mutants: A rare homoplasmic nad4 deletion mutant plant. Journal of Heredity 90: 369-373.
    • (1999) Journal of Heredity , vol.90 , pp. 369-373
    • Yamato, K.T.1    Newton, K.J.2
  • 12
    • 0026529575 scopus 로고
    • Small repeated sequences and the structure of plant mitochondrial genomes
    • André C, Levy A, Walbot V (1992) Small repeated sequences and the structure of plant mitochondrial genomes. Trends in Genetics 8: 128-132.
    • (1992) Trends in Genetics , vol.8 , pp. 128-132
    • André, C.1    Levy, A.2    Walbot, V.3
  • 13
    • 77954693072 scopus 로고    scopus 로고
    • Recombination and the maintenance of plant organelle genome stability
    • Marechal A, Brisson N (2010) Recombination and the maintenance of plant organelle genome stability. New Phytologist 186: 299-317.
    • (2010) New Phytologist , vol.186 , pp. 299-317
    • Marechal, A.1    Brisson, N.2
  • 15
    • 0000177987 scopus 로고
    • Evidence for homologous recombination between repeated sequences containing 18S and 5S ribosomal RNA genes in wheat mitochondrial DNA
    • Falconet D, Lejeune B, Quetier F, Gray MW (1984) Evidence for homologous recombination between repeated sequences containing 18S and 5S ribosomal RNA genes in wheat mitochondrial DNA. Embo Journal 3: 297-302.
    • (1984) Embo Journal , vol.3 , pp. 297-302
    • Falconet, D.1    Lejeune, B.2    Quetier, F.3    Gray, M.W.4
  • 16
    • 28544439733 scopus 로고    scopus 로고
    • Structural dynamics of cereal mitochondrial genomes as revealed by complete nucleotide sequencing of the wheat mitochondrial genome
    • Ogihara Y, Yamazaki Y, Murai K, Kanno A, Terachi T, et al. (2005) Structural dynamics of cereal mitochondrial genomes as revealed by complete nucleotide sequencing of the wheat mitochondrial genome. Nucleic Acids Research 33: 6235-6250.
    • (2005) Nucleic Acids Research , vol.33 , pp. 6235-6250
    • Ogihara, Y.1    Yamazaki, Y.2    Murai, K.3    Kanno, A.4    Terachi, T.5
  • 17
    • 77956455970 scopus 로고    scopus 로고
    • Extensive loss of translational genes in the structurally dynamic mitochondrial genome of the angiosperm Silene latifolia
    • Sloan DB, Alverson AJ, Štorchová H, Palmer JD, Taylor DR (2010) Extensive loss of translational genes in the structurally dynamic mitochondrial genome of the angiosperm Silene latifolia. BMC Evolutionary Biology 10: 274.
    • (2010) BMC Evolutionary Biology , vol.10 , pp. 274
    • Sloan, D.B.1    Alverson, A.J.2    Štorchová, H.3    Palmer, J.D.4    Taylor, D.R.5
  • 18
    • 15044341867 scopus 로고    scopus 로고
    • The complete nucleotide sequence and multipartite organization of the tobacco mitochondrial genome: Comparative analysis of mitochondrial genomes in higher plants
    • Sugiyama Y, Watase Y, Nagase M, Makita N, Yagura S, et al. (2005) The complete nucleotide sequence and multipartite organization of the tobacco mitochondrial genome: comparative analysis of mitochondrial genomes in higher plants. Molecular Genetics and Genomics 272: 603-615.
    • (2005) Molecular Genetics and Genomics , vol.272 , pp. 603-615
    • Sugiyama, Y.1    Watase, Y.2    Nagase, M.3    Makita, N.4    Yagura, S.5
  • 19
    • 34250657287 scopus 로고    scopus 로고
    • Plant mitochondrial recombination surveillance requires unusual RecA and MutS homologs
    • Shedge V, Arrieta-Montiel M, Christensen AC, Mackenzie SA (2007) Plant mitochondrial recombination surveillance requires unusual RecA and MutS homologs. Plant Cell 19: 1251-1264.
    • (2007) Plant Cell , vol.19 , pp. 1251-1264
    • Shedge, V.1    Arrieta-Montiel, M.2    Christensen, A.C.3    Mackenzie, S.A.4
  • 20
    • 67649199170 scopus 로고    scopus 로고
    • Counting mtDNA molecules in Phaseolus vulgaris: Sublimons are constantly produced by recombination via short repeats and undergo rigorous selection during substoichiometric shifting
    • Woloszynska M, Trojanowski D (2009) Counting mtDNA molecules in Phaseolus vulgaris: sublimons are constantly produced by recombination via short repeats and undergo rigorous selection during substoichiometric shifting. Plant Molecular Biology 70: 511-521.
    • (2009) Plant Molecular Biology , vol.70 , pp. 511-521
    • Woloszynska, M.1    Trojanowski, D.2
  • 21
    • 0344719444 scopus 로고    scopus 로고
    • Evolution of mitochondrial gene content: Gene loss and transfer to the nucleus
    • Adams KL, Palmer JD (2003) Evolution of mitochondrial gene content: gene loss and transfer to the nucleus. Molecular Phylogenetics and Evolution 29: 380-395.
    • (2003) Molecular Phylogenetics and Evolution , vol.29 , pp. 380-395
    • Adams, K.L.1    Palmer, J.D.2
  • 22
    • 0037162534 scopus 로고    scopus 로고
    • Punctuated evolution of mitochondrial gene content: High and variable rates of mitochondrial gene loss and transfer to the nucleus during angiosperm evolution
    • Adams KL, Qiu Y-L, Stoutemyer M, Palmer JD (2002) Punctuated evolution of mitochondrial gene content: high and variable rates of mitochondrial gene loss and transfer to the nucleus during angiosperm evolution. Proceedings of the National Academy of Sciences of the United States of America 99: 9905-9912.
    • (2002) Proceedings of the National Academy of Sciences of the United States of America , vol.99 , pp. 9905-9912
    • Adams, K.L.1    Qiu, Y.-L.2    Stoutemyer, M.3    Palmer, J.D.4
  • 23
    • 0034917612 scopus 로고    scopus 로고
    • Multiple losses and transfers to the nucleus of two mitochondrial succinate dehydrogenase genes during angiosperm evolution
    • Adams KL, Rosenblueth M, Qiu Y-L, Palmer JD (2001) Multiple losses and transfers to the nucleus of two mitochondrial succinate dehydrogenase genes during angiosperm evolution. Genetics 158: 1289-1300.
    • (2001) Genetics , vol.158 , pp. 1289-1300
    • Adams, K.L.1    Rosenblueth, M.2    Qiu, Y.-L.3    Palmer, J.D.4
  • 24
    • 0033598682 scopus 로고    scopus 로고
    • Intracellular gene transfer in action: Dual transcription and multiple silencings of nuclear and mitochondrial cox2 genes in legumes
    • Adams KL, Song K, Roessler PG, Nugent JM, Doyle JL, et al. (1999) Intracellular gene transfer in action: dual transcription and multiple silencings of nuclear and mitochondrial cox2 genes in legumes. Proc Natl Acad Sci U S A 96: 13863-13868.
    • (1999) Proc Natl Acad Sci U S A , vol.96 , pp. 13863-13868
    • Adams, K.L.1    Song, K.2    Roessler, P.G.3    Nugent, J.M.4    Doyle, J.L.5
  • 25
    • 0026673926 scopus 로고
    • Silent mitochondrial and active nuclear genes for subunit 2 of cytochrome c oxidase (cox2) in soybean: Evidence for RNA-mediated gene transfer
    • Covello PS, Gray MW (1992) Silent mitochondrial and active nuclear genes for subunit 2 of cytochrome c oxidase (cox2) in soybean: evidence for RNA-mediated gene transfer. Embo Journal 11: 3815-3820.
    • (1992) Embo Journal , vol.11 , pp. 3815-3820
    • Covello, P.S.1    Gray, M.W.2
  • 26
    • 0036011018 scopus 로고    scopus 로고
    • Gene transfer from mitochondrion to nucleus: Novel mechanisms for gene activation from cox2
    • Daley DO, Adams KL, Clifton R, Qualmann S, Millar AH, et al. (2002) Gene transfer from mitochondrion to nucleus: novel mechanisms for gene activation from cox2. Plant J 30: 11-21.
    • (2002) Plant J , vol.30 , pp. 11-21
    • Daley, D.O.1    Adams, K.L.2    Clifton, R.3    Qualmann, S.4    Millar, A.H.5
  • 27
    • 0036678103 scopus 로고    scopus 로고
    • Intracellular gene transfer: Reduced hydrophobicity facilitates gene transfer for subunit 2 of cytochrome c oxidase
    • Daley DO, Clifton R, Whelan J (2002) Intracellular gene transfer: reduced hydrophobicity facilitates gene transfer for subunit 2 of cytochrome c oxidase. Proc Natl Acad Sci U S A 99: 10510-10515.
    • (2002) Proc Natl Acad Sci U S A , vol.99 , pp. 10510-10515
    • Daley, D.O.1    Clifton, R.2    Whelan, J.3
  • 28
    • 0026091126 scopus 로고
    • RNA-mediated transfer of the gene coxII from the mitochondrion to the nucleus during flowering plant evolutuion
    • Nugent JM, Palmer JD (1991) RNA-mediated transfer of the gene coxII from the mitochondrion to the nucleus during flowering plant evolutuion. Cell 66: 473-481.
    • (1991) Cell , vol.66 , pp. 473-481
    • Nugent, J.M.1    Palmer, J.D.2
  • 29
    • 0345581683 scopus 로고    scopus 로고
    • Import pathway of nuclear-encoded cytochrome c oxidase subunit 2 using yeast as a model
    • Qualmann SR, Daley DO, Whelan J, Pratje E (2003) Import pathway of nuclear-encoded cytochrome c oxidase subunit 2 using yeast as a model. Plant Biology 5: 481-490.
    • (2003) Plant Biology , vol.5 , pp. 481-490
    • Qualmann, S.R.1    Daley, D.O.2    Whelan, J.3    Pratje, E.4
  • 30
    • 85003342377 scopus 로고    scopus 로고
    • Pervasive survival of expressed mitochondrial rps14 pseudogenes in grasses and their relatives for 80 million years following three functional transfers to the nucleus
    • Ong HC, Palmer JD (2006) Pervasive survival of expressed mitochondrial rps14 pseudogenes in grasses and their relatives for 80 million years following three functional transfers to the nucleus. BMC Evol Biol 6: 55.
    • (2006) BMC Evol Biol , vol.6 , pp. 55
    • Ong, H.C.1    Palmer, J.D.2
  • 31
    • 77951922008 scopus 로고    scopus 로고
    • Discovery of the rpl10 gene in diverse plant mitochondrial genomes and its probable replacement by the nuclear gene for chloroplast RPL10 in two lineages of angiosperms
    • Kubo N, Arimura SI (2009) Discovery of the rpl10 gene in diverse plant mitochondrial genomes and its probable replacement by the nuclear gene for chloroplast RPL10 in two lineages of angiosperms. DNA Research 17: 1-9.
    • (2009) DNA Research , vol.17 , pp. 1-9
    • Kubo, N.1    Arimura, S.I.2
  • 32
    • 73449119982 scopus 로고    scopus 로고
    • Ribosomal protein L10 is encoded in the mitochondrial genome of many land plants and green algae
    • Mower JP, Bonen L (2009) Ribosomal protein L10 is encoded in the mitochondrial genome of many land plants and green algae. BMC Evol Biol 9: 265.
    • (2009) BMC Evol Biol , vol.9 , pp. 265
    • Mower, J.P.1    Bonen, L.2
  • 33
    • 0029670967 scopus 로고    scopus 로고
    • Copia-, gypsyand LINE-like retrotransposon fragments in the mitochondrial genome of Arabidopsis thaliana
    • Knoop V, Unseld M, Marienfeld J, Brandt P, Sunkel S, et al. (1996) copia-, gypsyand LINE-like retrotransposon fragments in the mitochondrial genome of Arabidopsis thaliana. Genetics 142: 579-585.
    • (1996) Genetics , vol.142 , pp. 579-585
    • Knoop, V.1    Unseld, M.2    Marienfeld, J.3    Brandt, P.4    Sunkel, S.5
  • 34
    • 0036051088 scopus 로고    scopus 로고
    • Structural features and expression analysis of a linear mitochondrial plasmid in rapeseed (Brassica napus L.)
    • Handa H, Itani K, Sato H (2002) Structural features and expression analysis of a linear mitochondrial plasmid in rapeseed (Brassica napus L.). Molecular Genetics and Genomics 267: 797-805.
    • (2002) Molecular Genetics and Genomics , vol.267 , pp. 797-805
    • Handa, H.1    Itani, K.2    Sato, H.3
  • 35
    • 47249115215 scopus 로고    scopus 로고
    • The mitochondrial genome of a cytoplasmic male sterile line of perennial ryegrass (Lolium perenne L.) contains an integrated linear plasmid-like element
    • McDermott P, Connolly V, Kavanagh TA (2008) The mitochondrial genome of a cytoplasmic male sterile line of perennial ryegrass (Lolium perenne L.) contains an integrated linear plasmid-like element. Theoretical and Applied Genetics 117: 459-470.
    • (2008) Theoretical and Applied Genetics , vol.117 , pp. 459-470
    • McDermott, P.1    Connolly, V.2    Kavanagh, T.A.3
  • 36
    • 57749192264 scopus 로고    scopus 로고
    • Mitochondrial DNA of Vitis vinifera and the issue of rampant horizontal gene transfer
    • Goremykin VV, Salamini F, Velasco R, Viola R (2009) Mitochondrial DNA of Vitis vinifera and the issue of rampant horizontal gene transfer. Mol Biol Evol 26: 99-110.
    • (2009) Mol Biol Evol , vol.26 , pp. 99-110
    • Goremykin, V.V.1    Salamini, F.2    Velasco, R.3    Viola, R.4
  • 38
    • 0023476739 scopus 로고
    • Unicircular structure of the Brassica hirta mitochondrial genome
    • Palmer JD, Herbon LA (1987) Unicircular structure of the Brassica hirta mitochondrial genome. Current Genetics 11: 565-570.
    • (1987) Current Genetics , vol.11 , pp. 565-570
    • Palmer, J.D.1    Herbon, L.A.2
  • 39
    • 34548568981 scopus 로고    scopus 로고
    • Extensive variation in synonymous substitution rates in mitochondrial genes of seed plants
    • Mower JP, Touzet P, Gummow JS, Delph LF, Palmer JD (2007) Extensive variation in synonymous substitution rates in mitochondrial genes of seed plants. BMC Evol Biol 7: 135.
    • (2007) BMC Evol Biol , vol.7 , pp. 135
    • Mower, J.P.1    Touzet, P.2    Gummow, J.S.3    Delph, L.F.4    Palmer, J.D.5
  • 40
    • 77956943288 scopus 로고    scopus 로고
    • Extensive loss of RNA editing sites in rapidly evolving Silene mitochondrial genomes: Selection vs. retroprocessing as the driving force
    • Sloan DB, MacQueen AH, Alverson AJ, Palmer JD, Taylor DR (2010) Extensive loss of RNA editing sites in rapidly evolving Silene mitochondrial genomes: selection vs. retroprocessing as the driving force. Genetics 185: 1369-1380.
    • (2010) Genetics , vol.185 , pp. 1369-1380
    • Sloan, D.B.1    McQueen, A.H.2    Alverson, A.J.3    Palmer, J.D.4    Taylor, D.R.5
  • 42
    • 0035145056 scopus 로고    scopus 로고
    • Evaluation of PCR-Generated Chimeras, Mutations, and Heteroduplexes with 16S rRNA Gene-Based Cloning
    • Qiu X, Wu L, Huang H, McDonel PE, Palumbo AV, et al. (2001) Evaluation of PCR-Generated Chimeras, Mutations, and Heteroduplexes with 16S rRNA Gene-Based Cloning. Applied and Environmental Microbiology 67: 880-887.
    • (2001) Applied and Environmental Microbiology , vol.67 , pp. 880-887
    • Qiu, X.1    Wu, L.2    Huang, H.3    McDonel, P.E.4    Palumbo, A.V.5
  • 43
    • 75549083380 scopus 로고    scopus 로고
    • Reducing the impact of PCR-mediated recombination in molecular evolution and environmental studies using a newgeneration high-fidelity DNA polymerase
    • Lahr DJG, Katz LA (2009) Reducing the impact of PCR-mediated recombination in molecular evolution and environmental studies using a newgeneration high-fidelity DNA polymerase. BioTechniques 47: 857-863.
    • (2009) BioTechniques , vol.47 , pp. 857-863
    • Lahr, D.J.G.1    Katz, L.A.2
  • 44
    • 0029059015 scopus 로고
    • Template-switching during DNA synthesis by Thermus aquaticus DNA polymerase I
    • Odelberg SJ, Weiss RB, Hata A, White R (1995) Template-switching during DNA synthesis by Thermus aquaticus DNA polymerase I. Nucleic Acids Research 23: 2049-2057.
    • (1995) Nucleic Acids Research , vol.23 , pp. 2049-2057
    • Odelberg, S.J.1    Weiss, R.B.2    Hata, A.3    White, R.4
  • 46
    • 0020480195 scopus 로고
    • Physical and gene mapping of chloroplast DNA from Atriplex triangularis and Cucumis sativa
    • Palmer JD (1982) Physical and gene mapping of chloroplast DNA from Atriplex triangularis and Cucumis sativa. Nucleic Acids Res 10: 1593-1605.
    • (1982) Nucleic Acids Res , vol.10 , pp. 1593-1605
    • Palmer, J.D.1
  • 47
    • 0031955116 scopus 로고    scopus 로고
    • Consed: A graphical tool for sequence finishing
    • Gordon D, Abajian C, Green P (1998) Consed: a graphical tool for sequence finishing. Genome Res 8: 195-202.
    • (1998) Genome Res , vol.8 , pp. 195-202
    • Gordon, D.1    Abajian, C.2    Green, P.3
  • 48
    • 0034284437 scopus 로고    scopus 로고
    • Repbase update: A database and an electronic journal of repetitive elements
    • Jurka J (2000) Repbase update: a database and an electronic journal of repetitive elements. Trends Genet 16: 418-420.
    • (2000) Trends Genet , vol.16 , pp. 418-420
    • Jurka, J.1


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.