1
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Alom KM, Seo YJ. Blocker-dUThiophene poly tailing-based method for assessing methyl transferase activity. Anal Bioanal Chem 2023:10.1007/s00216-023-04793-6. [PMID: 37289210 DOI: 10.1007/s00216-023-04793-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 05/24/2023] [Accepted: 06/01/2023] [Indexed: 06/09/2023]
Abstract
In this report, we present a method for the selective and sensitive detection of methyl transferase activity. The method uses a dsDNA probe that contains C3 spacers and is coupled with dUThioTP-TdT polymerase-based poly-tailing. The short dsDNA probe is designed with C3 spacers at both 3' ends to prevent any type of tailing reaction. However, the probe contains a methyl transferase recognition sequence that can methylate adenosines in the palindromic part of both strands. When a specific DpnI endonuclease is introduced, it selectively cleaves the dsDNA probe such that both strands are methylated, unblocking the probe into two separate dsDNA forms with exposed 3' OH groups. This makes the probe susceptible to tailing in the presence of a TdT tailing polymerase. The unblocked probe is then subjected to fluorescent dUThioTP-based tailing, which produces a strong fluorescent signal that indicates the presence of methyl transferase activity. In the absence of methyl transferase, the probe remains in the blocked state and does not undergo fluorescence. This method has a limit of detection of 0.049 U/mL with good selectivity and the potential for accurate MTase analysis.
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Affiliation(s)
- Kazi Morshed Alom
- Department of Chemistry, Jeonbuk National University, Jeonju, 561-756, Republic of Korea
| | - Young Jun Seo
- Department of Chemistry, Jeonbuk National University, Jeonju, 561-756, Republic of Korea.
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2
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Wen Q, Li D, Xi H, Huang G, Zhu W. Methylation-blocked cascade strand displacement amplification for rapid and sensitive fluorescence detection of DNA methyltransferase activity. J Pharm Biomed Anal 2022; 219:114935. [PMID: 35820248 DOI: 10.1016/j.jpba.2022.114935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 06/24/2022] [Accepted: 07/06/2022] [Indexed: 11/17/2022]
Abstract
DNA methylation catalyzed by DNA adenine methylation methyltransferase (Dam MTase) is strongly connected with a variety of biological processes, hence, monitoring Dam MTase activity is of great importance. Here, we developed a rapid and sensitive fluorescence sensing strategy for the detection of Dam MTase activity based on methylation-blocked enzymatic recycling amplification. In this fluorescence sensing system, Dam MTase-induced methylation blocked the subsequent reactions. In contrast, in the absence of Dam MTase, the unmethylated probe initiated the cascade strand displacement amplification for significant signal amplification. Under optimized conditions, this method has a lower detection limit of 0.67 U/mL and a shorter assay time (90 min) compared with previously reported similar methodologies.
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Affiliation(s)
- Qilin Wen
- College of Chemistry and Bioengineering, Guilin University of Technology, Guangxi 541004, China
| | - Dandan Li
- College of Chemistry and Bioengineering, Guilin University of Technology, Guangxi 541004, China
| | - Huai Xi
- College of Chemistry and Bioengineering, Guilin University of Technology, Guangxi 541004, China
| | - Guidan Huang
- College of Chemistry and Bioengineering, Guilin University of Technology, Guangxi 541004, China
| | - Wenyuan Zhu
- College of Chemistry and Bioengineering, Guilin University of Technology, Guangxi 541004, China.
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3
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Li F, Wu X, Gu M, Wang GL. Label-free and highly sensitive detection of DNA adenine methylation methyltransferase through cathodic photoelectrochemistry. Analyst 2021; 146:2646-2652. [PMID: 33660702 DOI: 10.1039/d0an02438d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
In this work, we report the first exploration of cathodic photoelectrochemistry for the determination of the activity of DNA adenine methylation (Dam) methyltransferase (MTase). In this sensing system, potassium ferricyanide (K3[Fe(CN)6]) can greatly stimulate the photocurrent of a CdS quantum dot (QD) sensitized NiO (NiO/CdS) photocathode. After immobilization of the hairpin DNA probe on the electrode surface, its high steric hindrance and the electrostatic repulsion block the access of K3[Fe(CN)6] to the electrode surface, leading to depressed photocurrent of the photocathode. Once the hairpin DNA probe is methylated by Dam MTase, it can be recognized and cleaved by Dpn I, and then further digested by (Exo I), ultimately leading to the removal of the hairpin DNA probe from the electrode surface. This configurational change induces the decrement of steric hindrance/electrostatic repulsion effects and allows the efficient flux of K3[Fe(CN)6] to the photoelectrode for photocurrent stimulation. The cathodic PEC assay is presented in the "turn-on" mode, which can detect Dam MTase in the linear range from 0.04 to 100 U mL-1, with a detection limit as low as 0.028 U mL-1. In principle, the platform presents a promising method for probing various biomolecules that can lead to configuration or charge variations at the electrode surface, which may become a general strategy for versatile targets.
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Affiliation(s)
- Fang Li
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China.
| | - Xiuming Wu
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China.
| | - Mengmeng Gu
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China.
| | - Guang-Li Wang
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China.
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Guo J, Gao M, Song Y, Lin L, Zhao K, Tian T, Liu D, Zhu Z, Yang CJ. An Allosteric-Probe for Detection of Alkaline Phosphatase Activity and Its Application in Immunoassay. Front Chem 2018; 6:618. [PMID: 30619826 PMCID: PMC6299030 DOI: 10.3389/fchem.2018.00618] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Accepted: 11/30/2018] [Indexed: 01/22/2023] Open
Abstract
A fluorescence strategy for alkaline phosphatase (ALP) assay in complicated samples with high sensitivity and strong stability is developed based on an allosteric probe (AP). This probe consists of two DNA strands, a streptavidin (SA) aptamer labeled by fluorophore and its totally complementary DNA (cDNA) with a phosphate group on the 5′ end. Upon ALP introduction, the phosphate group on the cDNA is hydrolyzed, leaving the unhydrolyzed cDNA sequence for lambda exonuclease (λ exo) digestion and releasing SA aptamer for binding to SA beads, which results in fluorescence enhancement of SA beads that can be detected by flow cytometry or microscopy. We have achieved a detection limit of 0.012 U/mL with a detection range of 0.02~0.15 U/mL in buffer and human serum. These figures of merit are better than or comparable to those of other methods. Because the fluorescence signal is localized on the beads, they can be separated to remove fluorescence background from complicated biological systems. Notably, the new strategy not only applies to ALP detection with simple design, easy operation, high sensitivity, and good compatibility in complex solution, but also can be utilized in ALP-linked immunosorbent assays for the detection of a wide range of targets.
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Affiliation(s)
- Jingjing Guo
- MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, Key Laboratory for Chemical Biology of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China
| | - Mingxuan Gao
- MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, Key Laboratory for Chemical Biology of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China
| | - Yanling Song
- Institute of Molecular Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Li Lin
- MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, Key Laboratory for Chemical Biology of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China
| | - Kaifeng Zhao
- MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, Key Laboratory for Chemical Biology of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China
| | - Tian Tian
- MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, Key Laboratory for Chemical Biology of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China
| | - Dan Liu
- MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, Key Laboratory for Chemical Biology of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China
| | - Zhi Zhu
- MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, Key Laboratory for Chemical Biology of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China
| | - Chaoyong James Yang
- MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, Key Laboratory for Chemical Biology of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China.,Institute of Molecular Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
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5
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Gao D, Zhang H, Xu Y, Liu Y, Xu H, Cui J. Fluorescent copper nanoclusters as a nano-dye for DNA methyltransferase activity analysis and inhibitor screening. Anal Biochem 2018; 559:5-10. [DOI: 10.1016/j.ab.2018.08.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 08/06/2018] [Accepted: 08/14/2018] [Indexed: 01/24/2023]
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Aptamers as Diagnostic Tools in Cancer. Pharmaceuticals (Basel) 2018; 11:ph11030086. [PMID: 30208607 PMCID: PMC6160954 DOI: 10.3390/ph11030086] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 08/30/2018] [Accepted: 09/02/2018] [Indexed: 02/08/2023] Open
Abstract
Cancer is the second leading cause of death worldwide. Researchers have been working hard on investigating not only improved therapeutics but also on early detection methods, both critical to increasing treatment efficacy, and developing methods for disease prevention. The use of nucleic acids, or aptamers, has emerged as more specific and accurate cancer diagnostic and therapeutic tools. Aptamers are single-stranded DNA or RNA molecules that recognize specific targets based on unique three-dimensional conformations. Despite the fact aptamer development has been mainly restricted to laboratory settings, the unique attributes of these molecules suggest their high potential for clinical advances in cancer detection. Aptamers can be selected for a wide range of targets, and also linked with an extensive variety of diagnostic agents, via physical or chemical conjugation, to improve previously-established detection methods or to be used as novel biosensors for cancer diagnosis. Consequently, herein we review the principal considerations and recent updates in cancer detection and imaging through aptamer-based molecules.
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Zhang X, Zhong XL, Jiang WW, Zeng SH, Pi T, Zheng XJ, Li ZM. Fluorescence-based Polymerase Amplification for the Sensitive Detection of DNA Methyltransferase Activity. ANAL SCI 2018; 34:959-964. [PMID: 30101892 DOI: 10.2116/analsci.18p080] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
DNA methyltransferase (MTase) is related to transcriptional repressor activity in biological functions. It is an essential for cancer diagnosis and therapeutics to detect DNA MTase activity sensitively. Here, a fluorescent system based on polymerase amplification has been developed to detect DNA adenine MTase (Dam) activity sensitively. The amplification is triggered by the probe DNA regions a, which are the primes of a polymerase-induced replicated reaction. They come from methylation and a digestion reaction of DNA S1-S1, including a 5'-GATC-3' sequence recognized by Dam MTase and methylation sensitive restriction endonuclease Dpn I. The intensities of fluorescence are dependent on the Dam MTase activity. The method shows fine sensitivity with a detection limit of 3.2 × 10-4 U mL-1 and specificity for Dam MTase. In human serum samples, the method has been successfully applied, and it has also been used to screen the inhibitors, which means that the developed method can be a powerful and potential tool for drug development and clinical diagnosis in the future.
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Affiliation(s)
- Xiao Zhang
- Department of Chemistry, Nanchang University
| | | | - Wen-Wen Jiang
- School of Nursing of Jiangxi University of Technology
| | - Si-Hao Zeng
- Department of Chemistry, Nanchang University
| | - Ting Pi
- Department of Chemistry, Nanchang University
| | | | - Zhi-Mei Li
- Department of Chemistry, Nanchang University
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8
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Rossetti M, Porchetta A. Allosterically regulated DNA-based switches: From design to bioanalytical applications. Anal Chim Acta 2018; 1012:30-41. [PMID: 29475471 DOI: 10.1016/j.aca.2017.12.046] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Revised: 12/10/2017] [Accepted: 12/28/2017] [Indexed: 02/07/2023]
Abstract
DNA-based switches are structure-switching biomolecules widely employed in different bioanalytical applications. Of particular interest are DNA-based switches whose activity is regulated through the use of allostery. Allostery is a naturally occurring mechanism in which ligand binding induces the modulation and fine control of a connected biomolecule function as a consequence of changes in concentration of the effector. Through this general mechanism, many different allosteric DNA-based switches able to respond in a highly controlled way at the presence of a specific molecular effector have been engineered. Here, we discuss how to design allosterically regulated DNA-based switches and their applications in the field of molecular sensing, diagnostic and drug release.
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Affiliation(s)
- Marianna Rossetti
- Chemistry Department, University of Rome, Tor Vergata, Via della Ricerca Scientifica, 00133, Rome, Italy
| | - Alessandro Porchetta
- Chemistry Department, University of Rome, Tor Vergata, Via della Ricerca Scientifica, 00133, Rome, Italy.
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Cui WR, Li ZJ, Chi BZ, Li ZM, Liang RP, Qiu JD. Ultrasensitively electrochemical detection activity of DNA methyltransferase using an autocatalytic and recycling amplification strategy. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2017.12.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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10
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Gao M, Guo J, Song Y, Zhu Z, Yang CJ. Detection of T4 Polynucleotide Kinase via Allosteric Aptamer Probe Platform. ACS APPLIED MATERIALS & INTERFACES 2017; 9:38356-38363. [PMID: 29027787 DOI: 10.1021/acsami.7b14185] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
As a vital enzyme in DNA phosphorylation and restoration, T4 polynucleotide kinase (T4 PNK) has aroused great interest in recent years. Therefore, numerous strategies have been established for highly sensitive detection of T4 PNK based on diverse signal amplification techniques. However, they often need sophisticated design, a variety of auxiliary reagents and enzymes, or cumbersome manipulations. We have designed a new kind of allosteric aptamer probe (AAP) consisting of streptavidin (SA) aptamer and the complementary DNA (cDNA) for simple detection of T4 PNK without signal amplification and with minimized interference in complex biological samples. When the 5'-terminus of the cDNA is phosphorylated by T4 PNK, the cDNA is degraded by lambda exonuclease to release the fluorescein amidite (FAM)-labeled SA aptamer, which subsequently binds to streptavidin beads. The enhancement of the fluorescence signal on SA beads can be detected precisely and easily by a microscope or flow cytometer. Our method performs well in complex biological samples as a result of the enrichment of the signaling molecules on beads, as well as simple manipulations to discard the background interference and nonbinding molecules. Without signal amplification techniques, our AAP method not only avoids complicated manipulations but also decreases the time required. With the advantages of ease of operation, reliability, and robustness for T4 PNK detection in buffer as well as real biological samples, the AAP has great potential for clinical diagnostics, inhibitor screening, and drug discovery.
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Affiliation(s)
- Mingxuan Gao
- MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, Collaborative Innovation Centre of Chemistry for Energy Materials, Key Laboratory for Chemical Biology of Fujian Province, Key Laboratory of Chronic Liver Disease and Hepatocellular Carcinoma of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, China
| | - Jingjing Guo
- MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, Collaborative Innovation Centre of Chemistry for Energy Materials, Key Laboratory for Chemical Biology of Fujian Province, Key Laboratory of Chronic Liver Disease and Hepatocellular Carcinoma of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, China
| | - Yanling Song
- MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, Collaborative Innovation Centre of Chemistry for Energy Materials, Key Laboratory for Chemical Biology of Fujian Province, Key Laboratory of Chronic Liver Disease and Hepatocellular Carcinoma of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, China
- The Key Lab of Analysis and Detection Technology for Food Safety of MOE, State Key Laboratory of Photocatalysis on Energy and Environment, College of Biological Science and Engineering, Fuzhou University , Fuzhou 350116, China
| | - Zhi Zhu
- MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, Collaborative Innovation Centre of Chemistry for Energy Materials, Key Laboratory for Chemical Biology of Fujian Province, Key Laboratory of Chronic Liver Disease and Hepatocellular Carcinoma of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, China
| | - Chaoyong James Yang
- MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, Collaborative Innovation Centre of Chemistry for Energy Materials, Key Laboratory for Chemical Biology of Fujian Province, Key Laboratory of Chronic Liver Disease and Hepatocellular Carcinoma of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, China
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Abstract
In the field of genetics, epigenetics is the study of changes in gene expression without any change in DNA sequences. Chemical base modification in DNA by DNA methyltransferase, and specifically methylation, has been well studied as the main mechanism of epigenetics. Therefore, the determination of DNA methylation of, for example, 5'-methylcytosine in the CpG sequence in mammals has attracted attention because it should prove valuable in a wide range of research fields including diagnosis, drug discovery, and therapy. Methylated DNA bases and DNA methyltransferase activity are analyzed using conventional methods; however, these methods are time-consuming and require complex multiple operations. Therefore, new methods and devices for DNA methylation analysis are now being actively developed. Furthermore, microfluidic technology has also been applied to DNA methylation analysis because the microfluidic platform offers the promising advantage of making it possible to perform thousands of DNA methylation reactions in small reaction volumes, resulting in a high-throughput analysis with high sensitivity. This review discusses epigenetics and the microfluidic platforms developed for DNA methylation analysis.
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Affiliation(s)
- Ryoji Kurita
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST) and DAILAB, Tsukuba Central 6, 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8566 Japan.
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