메뉴 건너뛰기




Volumn 8, Issue 1, 2013, Pages

Comparative Analysis of the Transcriptome in Tissues Secreting Purple and White Nacre in the Pearl Mussel Hyriopsis cumingii

Author keywords

[No Author keywords available]

Indexed keywords

CONTIG; TRANSCRIPTOME;

EID: 84872320266     PISSN: None     EISSN: 19326203     Source Type: Journal    
DOI: 10.1371/journal.pone.0053617     Document Type: Article
Times cited : (107)

References (70)
  • 1
    • 0030707506 scopus 로고    scopus 로고
    • Biomineralization: A pavement of pearl
    • Addadi L, Weiner S, (1997) Biomineralization: A pavement of pearl. Nature 389: 912-915.
    • (1997) Nature , vol.389 , pp. 912-915
    • Addadi, L.1    Weiner, S.2
  • 3
    • 16244401140 scopus 로고    scopus 로고
    • Biomimetism and bioinspiration as tools for the design of innovative materials and systems
    • Sanchez C, Arribart H, Guille MMG, (2005) Biomimetism and bioinspiration as tools for the design of innovative materials and systems. Nature materials 4: 277-288.
    • (2005) Nature Materials , vol.4 , pp. 277-288
    • Sanchez, C.1    Arribart, H.2    Guille, M.M.G.3
  • 4
    • 27144435592 scopus 로고    scopus 로고
    • The hierarchical architecture of nacre and its mimetic material
    • Oaki Y, Imai H, (2005) The hierarchical architecture of nacre and its mimetic material. Angewandte Chemie International Edition 44: 6571-6575.
    • (2005) Angewandte Chemie International Edition , vol.44 , pp. 6571-6575
    • Oaki, Y.1    Imai, H.2
  • 8
    • 35349000604 scopus 로고    scopus 로고
    • Dynamic expression of ancient and novel molluscan shell genes during ecological transitions
    • Jackson D, Wörheide G, Degnan B, (2007) Dynamic expression of ancient and novel molluscan shell genes during ecological transitions. BMC evolutionary biology 7: 160.
    • (2007) BMC Evolutionary Biology , vol.7 , pp. 160
    • Jackson, D.1    Wörheide, G.2    Degnan, B.3
  • 10
    • 4444330823 scopus 로고    scopus 로고
    • Recent Advances in Studies on Nacreous Layer Biomineralization Molecular and Cellular Aspects
    • Samata T, (2004) Recent Advances in Studies on Nacreous Layer Biomineralization Molecular and Cellular Aspects. Thalassas: An international journal of marine sciences 20: 25-44.
    • (2004) Thalassas: An International Journal of Marine Sciences , vol.20 , pp. 25-44
    • Samata, T.1
  • 11
    • 77958533593 scopus 로고    scopus 로고
    • Transcriptome and proteome analysis of Pinctada margaritifera calcifying mantle and shell: focus on biomineralization
    • Joubert C, Piquemal D, Marie B, Manchon L, Pierrat F, et al. (2010) Transcriptome and proteome analysis of Pinctada margaritifera calcifying mantle and shell: focus on biomineralization. BMC genomics 11: 613.
    • (2010) BMC Genomics , vol.11 , pp. 613
    • Joubert, C.1    Piquemal, D.2    Marie, B.3    Manchon, L.4    Pierrat, F.5
  • 13
    • 84872326065 scopus 로고    scopus 로고
    • Aquaculture in China-Freshwater pearl mussel
    • Li J, Li Y, (2009) Aquaculture in China-Freshwater pearl mussel. World Aquaculture 40: 60-62.
    • (2009) World Aquaculture , vol.40 , pp. 60-62
    • Li, J.1    Li, Y.2
  • 14
    • 84872362301 scopus 로고    scopus 로고
    • The main influencing factors on the quality of cultured pearls
    • Li J, Liu Y, (2011) The main influencing factors on the quality of cultured pearls. Journal of Fisheries of China 35: 1753-1760.
    • (2011) Journal of Fisheries of China , vol.35 , pp. 1753-1760
    • Li, J.1    Liu, Y.2
  • 15
    • 84880137205 scopus 로고    scopus 로고
    • Effects of dietary Europium complex and Europium (III) on cultured pearl colour in the pearl oyster Pinctada martensii
    • Ji L, Liu J, Song W, Li S, Miao D, (2012) Effects of dietary Europium complex and Europium (III) on cultured pearl colour in the pearl oyster Pinctada martensii. Aquaculture Research.
    • (2012) Aquaculture Research
    • Ji, L.1    Liu, J.2    Song, W.3    Li, S.4    Miao, D.5
  • 17
    • 77349083472 scopus 로고    scopus 로고
    • Assembly of 500,000 inter-specific catfish expressed sequence tags and large scale gene-associated marker development for whole genome association studies
    • Wang S, Peatman E, Abernathy J, Waldbieser G, Lindquist E, et al. (2010) Assembly of 500,000 inter-specific catfish expressed sequence tags and large scale gene-associated marker development for whole genome association studies. Genome biology 11: R8.
    • (2010) Genome Biology , vol.11
    • Wang, S.1    Peatman, E.2    Abernathy, J.3    Waldbieser, G.4    Lindquist, E.5
  • 18
    • 20244377471 scopus 로고    scopus 로고
    • Functional annotation of a full-length Arabidopsis cDNA collection
    • Seki M, Narusaka M, Kamiya A, Ishida J, Satou M, et al. (2002) Functional annotation of a full-length Arabidopsis cDNA collection. Science 296: 141-145.
    • (2002) Science , vol.296 , pp. 141-145
    • Seki, M.1    Narusaka, M.2    Kamiya, A.3    Ishida, J.4    Satou, M.5
  • 19
    • 0038270852 scopus 로고    scopus 로고
    • Comparative genomics of Physcomitrella patens gametophytic transcriptome and Arabidopsis thaliana: implication for land plant evolution
    • Nishiyama T, Fujita T, Shin-I T, Seki M, Nishide H, et al. (2003) Comparative genomics of Physcomitrella patens gametophytic transcriptome and Arabidopsis thaliana: implication for land plant evolution. Proceedings of the National Academy of Sciences 100: 8007.
    • (2003) Proceedings of the National Academy of Sciences , vol.100 , pp. 8007
    • Nishiyama, T.1    Fujita, T.2    Shin-I, T.3    Seki, M.4    Nishide, H.5
  • 20
    • 54349120289 scopus 로고    scopus 로고
    • Quality assessment parameters for EST-derived SNPs from catfish
    • Wang S, Sha Z, Sonstegard T, Liu H, Xu P, et al. (2008) Quality assessment parameters for EST-derived SNPs from catfish. BMC genomics 9: 450.
    • (2008) BMC Genomics , vol.9 , pp. 450
    • Wang, S.1    Sha, Z.2    Sonstegard, T.3    Liu, H.4    Xu, P.5
  • 21
    • 4344702182 scopus 로고    scopus 로고
    • DNA marker technologies and their applications in aquaculture genetics
    • Liu Z, Cordes J, (2004) DNA marker technologies and their applications in aquaculture genetics. Aquaculture 238: 1-37.
    • (2004) Aquaculture , vol.238 , pp. 1-37
    • Liu, Z.1    Cordes, J.2
  • 22
    • 79959587788 scopus 로고    scopus 로고
    • Transcriptome Sequencing and De Novo Analysis for Yesso Scallop (Patinopecten yessoensis) Using 454 GS FLX
    • Hou R, Bao Z, Wang S, Su H, Li Y, et al. (2011) Transcriptome Sequencing and De Novo Analysis for Yesso Scallop (Patinopecten yessoensis) Using 454 GS FLX. PLoS ONE 6: e21560.
    • (2011) PLoS ONE , vol.6
    • Hou, R.1    Bao, Z.2    Wang, S.3    Su, H.4    Li, Y.5
  • 23
    • 77955243152 scopus 로고    scopus 로고
    • Identification of Genes Potentially Involved in Pearl Formation by Expressed Sequence Tag Analysis of Mantle from Freshwater Pearl Mussel (Hyriopsis Cumingii Lea)
    • Bai Z, Yin Y, Hu S, Wang G, Zhang X, et al. (2010) Identification of Genes Potentially Involved in Pearl Formation by Expressed Sequence Tag Analysis of Mantle from Freshwater Pearl Mussel (Hyriopsis Cumingii Lea). Journal of Shellfish Research 29: 527-534.
    • (2010) Journal of Shellfish Research , vol.29 , pp. 527-534
    • Bai, Z.1    Yin, Y.2    Hu, S.3    Wang, G.4    Zhang, X.5
  • 24
    • 20844463584 scopus 로고    scopus 로고
    • Gene identification signature (GIS) analysis for transcriptome characterization and genome annotation
    • Ng P, Wei CL, Sung WK, Chiu KP, Lipovich L, et al. (2005) Gene identification signature (GIS) analysis for transcriptome characterization and genome annotation. Nature methods 2: 105-111.
    • (2005) Nature Methods , vol.2 , pp. 105-111
    • Ng, P.1    Wei, C.L.2    Sung, W.K.3    Chiu, K.P.4    Lipovich, L.5
  • 25
    • 0032849859 scopus 로고    scopus 로고
    • CAP3: A DNA sequence assembly program
    • Huang X, Madan A, (1999) CAP3: A DNA sequence assembly program. Genome Res 9: 868-877.
    • (1999) Genome Res , vol.9 , pp. 868-877
    • Huang, X.1    Madan, A.2
  • 26
    • 0034201441 scopus 로고    scopus 로고
    • EMBOSS: the European Molecular Biology Open Software Suite
    • Rice P, Longden I, Bleasby A, (2000) EMBOSS: the European Molecular Biology Open Software Suite. Trends in genetics: TIG 16: 276-277.
    • (2000) Trends in Genetics: TIG , vol.16 , pp. 276-277
    • Rice, P.1    Longden, I.2    Bleasby, A.3
  • 27
    • 18644368893 scopus 로고    scopus 로고
    • GoPipe: streamlined gene ontology annotation for batch anonymous sequences with statistics
    • Chen Z, Xue C, Zhu S, Zhou F, Liu G, et al. (2005) GoPipe: streamlined gene ontology annotation for batch anonymous sequences with statistics. Progress in Biochemistry and Biophysics 32: 187-191.
    • (2005) Progress in Biochemistry and Biophysics , vol.32 , pp. 187-191
    • Chen, Z.1    Xue, C.2    Zhu, S.3    Zhou, F.4    Liu, G.5
  • 30
    • 40749102414 scopus 로고    scopus 로고
    • XSTREAM: a practical algorithm for identification and architecture modeling of tandem repeats in protein sequences
    • Newman A, Cooper J, (2007) XSTREAM: a practical algorithm for identification and architecture modeling of tandem repeats in protein sequences. BMC bioinformatics 8: 382.
    • (2007) BMC Bioinformatics , vol.8 , pp. 382
    • Newman, A.1    Cooper, J.2
  • 32
    • 75249095274 scopus 로고    scopus 로고
    • DEGseq: an R package for identifying differentially expressed genes from RNA-seq data
    • Wang L, Feng Z, Wang X, Zhang X, (2010) DEGseq: an R package for identifying differentially expressed genes from RNA-seq data. Bioinformatics 26: 136-138.
    • (2010) Bioinformatics , vol.26 , pp. 136-138
    • Wang, L.1    Feng, Z.2    Wang, X.3    Zhang, X.4
  • 33
    • 0032706623 scopus 로고    scopus 로고
    • A general approach to single-nucleotide polymorphism discovery
    • Marth GT, Korf I, Yandell MD, Yeh RT, Gu Z, et al. (1999) A general approach to single-nucleotide polymorphism discovery. Nat Genet 23: 452-456.
    • (1999) Nat Genet , vol.23 , pp. 452-456
    • Marth, G.T.1    Korf, I.2    Yandell, M.D.3    Yeh, R.T.4    Gu, Z.5
  • 34
    • 67349104410 scopus 로고    scopus 로고
    • Identification of genes involved in immune response, microsatellite, and SNP markers from expressed sequence tags generated from hemocytes of freshwater pearl mussel (Hyriopsis cumingii)
    • Bai Z, Yin Y, Hu S, Wang G, Zhang X, et al. (2009) Identification of genes involved in immune response, microsatellite, and SNP markers from expressed sequence tags generated from hemocytes of freshwater pearl mussel (Hyriopsis cumingii). Marine biotechnology 11: 520-530.
    • (2009) Marine Biotechnology , vol.11 , pp. 520-530
    • Bai, Z.1    Yin, Y.2    Hu, S.3    Wang, G.4    Zhang, X.5
  • 35
    • 0030960992 scopus 로고    scopus 로고
    • Small open reading frames: beautiful needles in the haystack
    • Basrai MA, Hieter P, Boeke JD, (1997) Small open reading frames: beautiful needles in the haystack. Genome research 7: 768-771.
    • (1997) Genome Research , vol.7 , pp. 768-771
    • Basrai, M.A.1    Hieter, P.2    Boeke, J.D.3
  • 36
    • 31344456451 scopus 로고    scopus 로고
    • Mollusk shell formation: a source of new concepts for understanding biomineralization processes
    • Addadi L, Joester D, Nudelman F, Weiner S, (2006) Mollusk shell formation: a source of new concepts for understanding biomineralization processes. Chemistry 12: 980-987.
    • (2006) Chemistry , vol.12 , pp. 980-987
    • Addadi, L.1    Joester, D.2    Nudelman, F.3    Weiner, S.4
  • 37
    • 0035782670 scopus 로고    scopus 로고
    • Structure of the nacreous organic matrix of a bivalve mollusk shell examined in the hydrated state using cryo-TEM
    • Levi-Kalisman Y, Falini G, Addadi L, Weiner S, (2001) Structure of the nacreous organic matrix of a bivalve mollusk shell examined in the hydrated state using cryo-TEM. Journal of structural biology 135: 8-17.
    • (2001) Journal of Structural Biology , vol.135 , pp. 8-17
    • Levi-Kalisman, Y.1    Falini, G.2    Addadi, L.3    Weiner, S.4
  • 38
    • 26644450061 scopus 로고    scopus 로고
    • Caspartin and calprismin, two proteins of the shell calcitic prisms of the Mediterranean fan mussel Pinna nobilis
    • Marin F, Amons R, Guichard N, Stigter M, Hecker A, et al. (2005) Caspartin and calprismin, two proteins of the shell calcitic prisms of the Mediterranean fan mussel Pinna nobilis. The Journal of biological chemistry 280: 33895-33908.
    • (2005) The Journal of Biological Chemistry , vol.280 , pp. 33895-33908
    • Marin, F.1    Amons, R.2    Guichard, N.3    Stigter, M.4    Hecker, A.5
  • 39
    • 70249111462 scopus 로고    scopus 로고
    • An acidic matrix protein, Pif, is a key macromolecule for nacre formation
    • Suzuki M, Saruwatari K, Kogure T, Yamamoto Y, Nishimura T, et al. (2009) An acidic matrix protein, Pif, is a key macromolecule for nacre formation. Science 325: 1388-1390.
    • (2009) Science , vol.325 , pp. 1388-1390
    • Suzuki, M.1    Saruwatari, K.2    Kogure, T.3    Yamamoto, Y.4    Nishimura, T.5
  • 40
    • 33144481922 scopus 로고    scopus 로고
    • Biphasic and dually coordinated expression of the genes encoding major shell matrix proteins in the pearl oyster Pinctada fucata
    • Takeuchi T, Endo K, (2006) Biphasic and dually coordinated expression of the genes encoding major shell matrix proteins in the pearl oyster Pinctada fucata. Marine biotechnology 8: 52-61.
    • (2006) Marine Biotechnology , vol.8 , pp. 52-61
    • Takeuchi, T.1    Endo, K.2
  • 41
    • 18144377424 scopus 로고    scopus 로고
    • The carbonic anhydrase domain protein nacrein is expressed in the epithelial cells of the mantle and acts as a negative regulator in calcification in the mollusc Pinctada fucata
    • Miyamoto H, Miyoshi F, Kohno J, (2005) The carbonic anhydrase domain protein nacrein is expressed in the epithelial cells of the mantle and acts as a negative regulator in calcification in the mollusc Pinctada fucata. Zoological science 22: 311-315.
    • (2005) Zoological Science , vol.22 , pp. 311-315
    • Miyamoto, H.1    Miyoshi, F.2    Kohno, J.3
  • 43
    • 0141976289 scopus 로고    scopus 로고
    • The major soluble 19.6 kDa protein of the organic shell matrix of the freshwater snail Biomphalaria glabrata is an N-glycosylated dermatopontin
    • Marxen JC, Nimtz M, Becker W, Mann K, (2003) The major soluble 19.6 kDa protein of the organic shell matrix of the freshwater snail Biomphalaria glabrata is an N-glycosylated dermatopontin. Biochimica et biophysica acta 1650: 92-98.
    • (2003) Biochimica Et Biophysica Acta , vol.1650 , pp. 92-98
    • Marxen, J.C.1    Nimtz, M.2    Becker, W.3    Mann, K.4
  • 45
    • 84860847067 scopus 로고    scopus 로고
    • Novel basic protein, PfN23, functions as key macromolecule during nacre formation
    • Fang D, Pan C, Lin H, Lin Y, Zhang G, et al. (2012) Novel basic protein, PfN23, functions as key macromolecule during nacre formation. The Journal of biological chemistry 287: 15776-15785.
    • (2012) The Journal of Biological Chemistry , vol.287 , pp. 15776-15785
    • Fang, D.1    Pan, C.2    Lin, H.3    Lin, Y.4    Zhang, G.5
  • 46
    • 84872353426 scopus 로고    scopus 로고
    • Study on compositions and colour ing mechan ism of freshwater cultured pearls
    • Yang YM, Guo SG, Shi LY, Wang WZ, (2004) Study on compositions and colour ing mechan ism of freshwater cultured pearls. Journal of gems and gemmology 6: 10-13.
    • (2004) Journal of Gems and Gemmology , vol.6 , pp. 10-13
    • Yang, Y.M.1    Guo, S.G.2    Shi, L.Y.3    Wang, W.Z.4
  • 47
    • 44949215706 scopus 로고    scopus 로고
    • Characterization of calcium deposition and shell matrix protein secretion in primary mantle tissue culture from the marine pearl oyster Pinctada fucata
    • Gong N, Ma Z, Li Q, Yan Z, Xie L, et al. (2008) Characterization of calcium deposition and shell matrix protein secretion in primary mantle tissue culture from the marine pearl oyster Pinctada fucata. Mar Biotechnol 10: 457-465.
    • (2008) Mar Biotechnol , vol.10 , pp. 457-465
    • Gong, N.1    Ma, Z.2    Li, Q.3    Yan, Z.4    Xie, L.5
  • 48
    • 0037704505 scopus 로고    scopus 로고
    • Taking advantage of disorder: amorphous calcium carbonate and its roles in biomineralization
    • Addadi L, Raz S, Weiner S, (2003) Taking advantage of disorder: amorphous calcium carbonate and its roles in biomineralization. Advanced Materials 15: 959-970.
    • (2003) Advanced Materials , vol.15 , pp. 959-970
    • Addadi, L.1    Raz, S.2    Weiner, S.3
  • 49
    • 0037045232 scopus 로고    scopus 로고
    • Factors involved in the formation of amorphous and crystalline calcium carbonate: a study of an ascidian skeleton
    • Aizenberg J, Lambert G, Weiner S, Addadi L, (2002) Factors involved in the formation of amorphous and crystalline calcium carbonate: a study of an ascidian skeleton. Journal of the American Chemical Society 124: 32-39.
    • (2002) Journal of the American Chemical Society , vol.124 , pp. 32-39
    • Aizenberg, J.1    Lambert, G.2    Weiner, S.3    Addadi, L.4
  • 51
    • 57749195712 scopus 로고    scopus 로고
    • RNA-Seq: a revolutionary tool for transcriptomics
    • Wang Z, Gerstein M, Snyder M, (2009) RNA-Seq: a revolutionary tool for transcriptomics. Nature Reviews Genetics 10: 57-63.
    • (2009) Nature Reviews Genetics , vol.10 , pp. 57-63
    • Wang, Z.1    Gerstein, M.2    Snyder, M.3
  • 53
    • 5744232881 scopus 로고    scopus 로고
    • Conservation of signal molecules involved in biomineralisation control in calcifying matrices of bone and shell
    • Milet C, Berland S, Lamghari M, Mouries L, Jolly C, et al. (2004) Conservation of signal molecules involved in biomineralisation control in calcifying matrices of bone and shell. Comptes Rendus Palevol 3: 493-501.
    • (2004) Comptes Rendus Palevol , vol.3 , pp. 493-501
    • Milet, C.1    Berland, S.2    Lamghari, M.3    Mouries, L.4    Jolly, C.5
  • 54
    • 79955610729 scopus 로고    scopus 로고
    • Epidermal growth factor receptor plays an anabolic role in bone metabolism in vivo
    • Zhang X, Tamasi J, Lu X, Zhu J, Chen H, et al. (2011) Epidermal growth factor receptor plays an anabolic role in bone metabolism in vivo. Journal of Bone and Mineral Research 26: 1022-1034.
    • (2011) Journal of Bone and Mineral Research , vol.26 , pp. 1022-1034
    • Zhang, X.1    Tamasi, J.2    Lu, X.3    Zhu, J.4    Chen, H.5
  • 55
    • 35348923714 scopus 로고    scopus 로고
    • The bone morphogenetic protein 1/Tolloid-like metalloproteinases
    • Hopkins DR, Keles S, Greenspan DS, (2007) The bone morphogenetic protein 1/Tolloid-like metalloproteinases. Matrix Biology 26: 508-523.
    • (2007) Matrix Biology , vol.26 , pp. 508-523
    • Hopkins, D.R.1    Keles, S.2    Greenspan, D.S.3
  • 56
    • 4644333916 scopus 로고    scopus 로고
    • Semaphorin profiling of periodontal fibroblasts and osteoblasts
    • Lallier T, (2004) Semaphorin profiling of periodontal fibroblasts and osteoblasts. Journal of dental research 83: 677-682.
    • (2004) Journal of Dental Research , vol.83 , pp. 677-682
    • Lallier, T.1
  • 59
    • 38149085101 scopus 로고    scopus 로고
    • Regulatory mechanisms of mitogen-activated kinase signaling
    • Zhang Y, Dong C, (2007) Regulatory mechanisms of mitogen-activated kinase signaling. Cellular and molecular life sciences 64: 2771-2789.
    • (2007) Cellular and Molecular Life Sciences , vol.64 , pp. 2771-2789
    • Zhang, Y.1    Dong, C.2
  • 61
    • 0031888276 scopus 로고    scopus 로고
    • Bone-specific expression of the alpha chain of the nascent polypeptide-associated complex, a coactivator potentiating c-Jun-mediated transcription
    • Moreau A, Yotov WV, Glorieux FH, St-Arnaud R, (1998) Bone-specific expression of the alpha chain of the nascent polypeptide-associated complex, a coactivator potentiating c-Jun-mediated transcription. Molecular and cellular biology 18: 1312.
    • (1998) Molecular and Cellular Biology , vol.18 , pp. 1312
    • Moreau, A.1    Yotov, W.V.2    Glorieux, F.H.3    St-Arnaud, R.4
  • 63
    • 0034958883 scopus 로고    scopus 로고
    • Spectrin and Ankyrin-Based Pathways: Metazoan Inventions for Integrating Cells Into Tissues
    • Bennett V, Baines AJ, (2001) Spectrin and Ankyrin-Based Pathways: Metazoan Inventions for Integrating Cells Into Tissues. Physiological Reviews 81: 1353-1392.
    • (2001) Physiological Reviews , vol.81 , pp. 1353-1392
    • Bennett, V.1    Baines, A.J.2
  • 64
    • 0023835389 scopus 로고
    • Molecular recognition in biomineralization
    • Mann S, (1988) Molecular recognition in biomineralization. Nature 332: 119-124.
    • (1988) Nature , vol.332 , pp. 119-124
    • Mann, S.1
  • 65
    • 4344575287 scopus 로고    scopus 로고
    • Coiled coil domains: stability, specificity, and biological implications
    • Mason JM, Arndt KM, (2004) Coiled coil domains: stability, specificity, and biological implications. ChemBioChem 5: 170-176.
    • (2004) ChemBioChem , vol.5 , pp. 170-176
    • Mason, J.M.1    Arndt, K.M.2
  • 70
    • 0025863615 scopus 로고
    • Acidic macromolecules of mineralized tissues: the controllers of crystal formation
    • Weiner S, Addadi L, (1991) Acidic macromolecules of mineralized tissues: the controllers of crystal formation. Trends in biochemical sciences 16: 252-256.
    • (1991) Trends in Biochemical Sciences , vol.16 , pp. 252-256
    • Weiner, S.1    Addadi, L.2


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.