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Hou Y, Lu X, Yang J, Tang C, Jiang H, Cai T, Chen M, Wei Z, Yu P. A label-free fluorescent aptamer sensor for testosterone based on SYBR Green I. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2023; 15:1546-1552. [PMID: 36883443 DOI: 10.1039/d3ay00055a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Testosterone is a steroid hormone that plays an indispensable role in the normal metabolism of organisms. However, exogenous testosterone, even as low as nmol L-1, will harm the human body due to accumulation. In this study, we developed an unlabeled fluorescent sensor for testosterone based on SYBR Green I. SYBR Green I is a fluorescent dye that can be embedded into the G-quadruplex of the testosterone aptamer T5. The fluorescence quenching effect is utilized to achieve quantitative detection, which occurs by the competition between testosterone and SYBR Green I for the T5 aptamer binding sites. In this work, we optimized the detection conditions to make the fluorescent sensor more sensitive and verify the specificity, linear range, and detection ability in the buffer and real water samples. The sensor's LOD and LOQ values were 0.27 nmol L-1 and 0.91 nmol L-1, respectively, while the detection range was linear from 0.91 nmol L-1 to 2000 nmol L-1. According to the results, the sensor shows high specificity and good performance even in real sample detection such as tap water and river water, providing an alternative method for the quantitative detection of testosterone in the environment, which is more convenient and efficient.
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Affiliation(s)
- Yucui Hou
- Xiangya School of Pharmaceutical Sciences, Central South University, No. 172, Tongzipo Road, Changsha 410013, Hunan Province, China.
| | - Xiaoling Lu
- Xiangya School of Pharmaceutical Sciences, Central South University, No. 172, Tongzipo Road, Changsha 410013, Hunan Province, China.
| | - Jie Yang
- Xiangya School of Pharmaceutical Sciences, Central South University, No. 172, Tongzipo Road, Changsha 410013, Hunan Province, China.
| | - Chunhua Tang
- Xiangya School of Pharmaceutical Sciences, Central South University, No. 172, Tongzipo Road, Changsha 410013, Hunan Province, China.
| | - Hanbing Jiang
- Xiangya School of Pharmaceutical Sciences, Central South University, No. 172, Tongzipo Road, Changsha 410013, Hunan Province, China.
| | - Tongji Cai
- Xiangya School of Pharmaceutical Sciences, Central South University, No. 172, Tongzipo Road, Changsha 410013, Hunan Province, China.
| | - Meilun Chen
- Xiangya School of Pharmaceutical Sciences, Central South University, No. 172, Tongzipo Road, Changsha 410013, Hunan Province, China.
| | - Zheng Wei
- Xiangya School of Pharmaceutical Sciences, Central South University, No. 172, Tongzipo Road, Changsha 410013, Hunan Province, China.
| | - Peng Yu
- Xiangya School of Pharmaceutical Sciences, Central South University, No. 172, Tongzipo Road, Changsha 410013, Hunan Province, China.
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Li L, Dai S, Liu JY, Wu W, Zhao QX, Wang X, Wang N, Xu ZH. Antagonistic Effect and In Vitro Activity of Dauricine on Glucagon Receptor. JOURNAL OF NATURAL PRODUCTS 2022; 85:2035-2043. [PMID: 35834753 DOI: 10.1021/acs.jnatprod.2c00446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Abnormal increases in glucagon (GCG) are the primary cause of type II diabetes mellitus. When GCG interacts with a glucagon receptor (GCGR), GCG can increase the blood glucose level. In this paper, a compound that could interfere with the binding of GCG and GCGR to inhibit the increase of blood glucose was investigated. First, molecular docking was used to conduct preliminary screening of compounds whose active components could combine with GCGR by AutoDock Vina. The binding of the receptor-ligand complex was analyzed by PyMOL. Results showed that dauricine could tightly bind to the receptor pocket. Second, the plasmid pcDNA3.1(+)-GCGR containing the target gene was transfected into HEK293 cells for expression, which was the cell model established to screen GCGR antagonist. Dauricine, the lead compound of glucagon receptor antagonist (GRA), was screened using the GRA screening model in vitro. Finally, using [Des-His1, Glu9]-Glucagon amide as the positive control, flow cytometry was used to express the antagonistic effect of the compound. Consequently, dauricine can antagonize the GCGR.
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Affiliation(s)
- Li Li
- College of Science, Xihua University, Chengdu 610039, China
| | - Shuang Dai
- College of Science, Xihua University, Chengdu 610039, China
| | - Jing-Ya Liu
- College of Science, Xihua University, Chengdu 610039, China
| | - Wei Wu
- College of Science, Xihua University, Chengdu 610039, China
| | - Qian-Xi Zhao
- College of Science, Xihua University, Chengdu 610039, China
| | - Xin Wang
- College of Science, Xihua University, Chengdu 610039, China
| | - Na Wang
- College of Science, Xihua University, Chengdu 610039, China
| | - Zhi-Hong Xu
- College of Science, Xihua University, Chengdu 610039, China
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3
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Sun L, Liu J, Li L, Zhen D, Dai Z, Tang S, Zhu B, Chen L, Chen H, Gong M, Tang Z, Hu Y. Advances of biosensors for UO22+ detecting based on specific DNAzyme. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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4
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Sayed A, Othman IM, Hamam M, Gomaa H, Gadallah MI, Mostfa M, Ali HRH, Emran MY, Abdel-Hakim M, Mahross M. A novel fluorescent sensor for fast and highly selective turn-off detection of Fe3+ in water and pharmaceutical samples using synthesized azopyrazole-benzenesulfonamide derivative. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129175] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Li M, Fu Y, Jin L. A dual-signal sensing system based on organic dyes-LDHs film for fluorescence detection of cysteine. Dalton Trans 2017; 46:7284-7290. [DOI: 10.1039/c7dt01555k] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
It is of great significance to sense cysteine (Cys) in a simple and fast way because of its potential applications in biological processes.
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Affiliation(s)
- Mingzhe Li
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- P. R China
| | - Yanyan Fu
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- P. R China
| | - Lan Jin
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- P. R China
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Li H, Arroyo-Currás N, Kang D, Ricci F, Plaxco KW. Dual-Reporter Drift Correction To Enhance the Performance of Electrochemical Aptamer-Based Sensors in Whole Blood. J Am Chem Soc 2016; 138:15809-15812. [PMID: 27960346 DOI: 10.1021/jacs.6b08671] [Citation(s) in RCA: 88] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The continuous, real-time monitoring of specific molecular targets in unprocessed clinical samples would enable many transformative medical applications. Electrochemical aptamer-based (E-AB) sensors appear to be a promising approach to this end because of their selectivity (performance in complex samples, such as serum) and reversible, single-step operation. E-AB sensors suffer, however, from often-severe baseline drift when challenged in undiluted whole blood. In response we report here a dual-reporter approach to performing E-AB baseline drift correction. The approach incorporates two redox reporters on the aptamer, one of which serves as the target-responsive sensor and the other, which reports at a distinct, nonoverlapping redox potential, serving as a drift-correcting reference. Taking the difference in their relative signals largely eliminates the drift observed for these sensors in flowing, undiluted whole blood, reducing drift of up to 50% to less than 2% over many hours of continuous operation under these challenging conditions.
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Affiliation(s)
- Hui Li
- Department of Chemistry and Biochemistry, University of California-Santa Barbara , Santa Barbara, California 93106, United States
| | - Netzahualcóyotl Arroyo-Currás
- Department of Chemistry and Biochemistry, University of California-Santa Barbara , Santa Barbara, California 93106, United States
| | - Di Kang
- Department of Chemistry and Biochemistry, University of California-Santa Barbara , Santa Barbara, California 93106, United States
| | - Francesco Ricci
- Department of Chemistry, University of Rome , Tor Vergata, Via della Ricerca Scientifica, 00133, Rome, Italy.,Consorzio Interuniversitario Biostrutture e Biosistemi "INBB" , Rome 00136, Italy
| | - Kevin W Plaxco
- Department of Chemistry and Biochemistry, University of California-Santa Barbara , Santa Barbara, California 93106, United States.,Center for Bioengineering, University of California-Santa Barbara , Santa Barbara, California 93106, United States
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Ji X, Xiao C, Lau WF, Li J, Fu J. Metal enhanced fluorescence improved protein and DNA detection by zigzag Ag nanorod arrays. Biosens Bioelectron 2016; 82:240-7. [DOI: 10.1016/j.bios.2016.04.022] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Revised: 03/23/2016] [Accepted: 04/07/2016] [Indexed: 01/14/2023]
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Liu K, Yan X, Mao B, Wang S, Deng L. Aptamer-based detection of Salmonella enteritidis using double signal amplification by Klenow fragment and dual fluorescence. Mikrochim Acta 2015. [DOI: 10.1007/s00604-015-1692-4] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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9
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Chevalier A, Renard PY, Romieu A. Straightforward synthesis of bioconjugatable azo dyes. Part 2: Black Hole Quencher-2 (BHQ-2) and BlackBerry Quencher 650 (BBQ-650) scaffolds. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.10.054] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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10
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Zhou R, Xu C, Dong J, Wang G. Labeling-free fluorescent detection of DNA hybridization through FRET from pyrene excimer to DNA intercalator SYBR green I. Biosens Bioelectron 2014; 65:103-7. [PMID: 25461145 DOI: 10.1016/j.bios.2014.10.029] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Revised: 10/08/2014] [Accepted: 10/13/2014] [Indexed: 01/22/2023]
Abstract
A novel labeling-free fluorescence complex probe has been developed for DNA hybridization detection based on fluorescence resonance energy transfer (FRET) mechanism from pyrene excimer of pyrene-functionalized poly [2-(N, N-dimethylamino) ethyl methacrylate] (PFP) to SYBR Green I (SG, a specific intercalator of double-stranded DNA) in a cost-effective, rapid and simple manner. The complex probe consists of the positively charged PFP, SG and negatively charged single-stranded DNA (ssDNA). Upon adding a complementary strand to the complex probe solution, double-stranded DNA (dsDNA) was formed, followed by the intercalation of SG into dsDNA. The pyrene excimer emission was overlapped with the absorption of SG very well and the electrostatic interactions between PFP and dsDNA kept them in close proximity, enabling efficient FRET from pyrene excimer to SG. The fluorescence of SG in the duplex DNA resulting from FRET can be successfully applied to detect DNA hybridization with high sensitivity for a very low detection limit of 10nM and excellent selectivity for detection of single base pair mismatch.
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Affiliation(s)
- Ruyi Zhou
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Chen Xu
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Jie Dong
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Guojie Wang
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China.
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Xiang D, Zhai K, Xiang W, Wang L. Highly sensitive fluorescence quantitative detection of specific DNA sequences with molecular beacons and nucleic acid dye SYBR Green I. Talanta 2014; 129:249-53. [PMID: 25127591 DOI: 10.1016/j.talanta.2014.05.040] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2014] [Revised: 05/17/2014] [Accepted: 05/20/2014] [Indexed: 10/25/2022]
Abstract
A highly sensitive fluorescence method of quantitative detection for specific DNA sequence is developed based on molecular beacon (MB) and nucleic acid dye SYBR Green I by synchronous fluorescence analysis. It is demonstrated by an oligonucleotide sequence of wild-type HBV (target DNA) as a model system. In this strategy, the fluorophore of MB is designed to be 6-carboxyfluorescein group (FAM), and the maximum excitation wavelength and maximum emission wavelength are both very close to that of SYBR Green I. In the presence of targets DNA, the MBs hybridize with the targets DNA and form double-strand DNA (dsDNA), the fluorophore FAM is separated from the quencher BHQ-1, thus the fluorophore emit fluorescence. At the same time, SYBR Green I binds to dsDNA, the fluorescence intensity of SYBR Green I is significantly enhanced. When targets DNA are detected by synchronous fluorescence analysis, the fluorescence peaks of FAM and SYBR Green I overlap completely, so the fluorescence signal of system will be significantly enhanced. Thus, highly sensitive fluorescence quantitative detection for DNA can be realized. Under the optimum conditions, the total fluorescence intensity of FAM and SYBR Green I exhibits good linear dependence on concentration of targets DNA in the range from 2×10(-11) to 2.5×10(-9)M. The detection limit of target DNA is estimated to be 9×10(-12)M (3σ). Compared with previously reported methods of detection DNA with MB, the proposed method can significantly enhance the detection sensitivity.
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Affiliation(s)
- Dongshan Xiang
- Key Laboratory of Biologic Resources Protection and Utilization of Hubei Province, Hubei Minzu University, Enshi 445000, China; School of Chemical and Environmental Engineering, Hubei Minzu University, Enshi 445000, China
| | - Kun Zhai
- School of Chemical and Environmental Engineering, Hubei Minzu University, Enshi 445000, China
| | - Wenjun Xiang
- Sichuan University of Arts and Science, Dazhou, 635000, China
| | - Lianzhi Wang
- School of Chemical and Environmental Engineering, Hubei Minzu University, Enshi 445000, China
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12
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Zhou G, Zhang X, Ji X, He Z. Ultrasensitive detection of small molecule-protein interaction via terminal protection of small molecule linked DNA and Exo III-aided DNA recycling amplification. Chem Commun (Camb) 2014; 49:8854-6. [PMID: 23964359 DOI: 10.1039/c3cc43621g] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Terminal protection of small molecule linked DNA assays amplified by Exo III-aided DNA recycling is developed for the detection of streptavidin-biotin interaction, with a detection limit of 0.8 fM streptavidin in the "turn-on" state, indicating that the proposed method is an ultrasensitive platform for the detection of small molecule-protein interactions.
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Affiliation(s)
- Guohua Zhou
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China.
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Ye T, Liu Y, Luo M, Xiang X, Ji X, Zhou G, He Z. Metal–organic framework-based molecular beacons for multiplexed DNA detection by synchronous fluorescence analysis. Analyst 2014; 139:1721-5. [DOI: 10.1039/c3an02077k] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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14
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Shi S, Wang X, Sun W, Wang X, Yao T, Ji L. Label-free fluorescent DNA biosensors based on metallointercalators and nanomaterials. Methods 2013; 64:305-14. [DOI: 10.1016/j.ymeth.2013.07.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2013] [Accepted: 07/07/2013] [Indexed: 10/26/2022] Open
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15
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Wang Q, Wang W, Lei J, Xu N, Gao F, Ju H. Fluorescence quenching of carbon nitride nanosheet through its interaction with DNA for versatile fluorescence sensing. Anal Chem 2013; 85:12182-8. [PMID: 24274810 DOI: 10.1021/ac403646n] [Citation(s) in RCA: 187] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
This work investigates the interaction of carbon nitride nanosheet (CNNS), a recently developed two-dimensional nanomaterial, with DNA and its fluorescence quenching mechanism on fluorophore labeled single-stranded DNA probes. The static quenching through the photoinduced electron transfer (PET) from the excited fluorophore to the conductive band of CNNS is identified. Utilizing the affinity change of CNNS to DNA probes upon their recognition to targets and the PET-based fluorescence quenching effect, a universal sensing strategy is proposed for design of several homogeneous fluorescence detection methods with short assay time and high sensitivity. This strategy is versatile and can be combined with different amplification tools for quick fluorescence sensing of DNA and extensive DNA related analytes such as metal cations, small molecules, and proteins. As examples, two simple fluorescence detection methods for DNA and Hg(2+), one facile detection method coupled with Exo III-mediated target recycling for sensitive DNA analysis, and a ratiometric fluorescence protocol for DNA detection are proposed. This work provides an avenue for understanding the interaction between two-dimensional nanomaterials and biomolecules and designing novel sensing strategies for extending the applications of nanomaterials in bioanalysis.
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Affiliation(s)
- Quanbo Wang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing, Jiangsu 210093, P.R. China
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Xiang X, Shi L, Luo M, Chen J, Ji X, He Z. Stepwise reagent introduction-based droplet platform for multiplexed DNA sensing. Biosens Bioelectron 2013; 49:403-9. [DOI: 10.1016/j.bios.2013.05.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2013] [Revised: 04/29/2013] [Accepted: 05/20/2013] [Indexed: 12/20/2022]
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17
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Cheng MS, Toh CS. Novel biosensing methodologies for ultrasensitive detection of viruses. Analyst 2013; 138:6219-29. [DOI: 10.1039/c3an01394d] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Zhang L, Zhang Y, Wei M, Yi Y, Li H, Yao S. A label-free fluorescent molecular switch for Cu2+ based on metal ion-triggered DNA-cleaving DNAzyme and DNA intercalator. NEW J CHEM 2013. [DOI: 10.1039/c3nj41103f] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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