1
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The influence of hapten spacer arm length on antibody response and immunoassay development. Anal Chim Acta 2023; 1239:340699. [PMID: 36628767 DOI: 10.1016/j.aca.2022.340699] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 11/22/2022] [Accepted: 12/01/2022] [Indexed: 12/12/2022]
Abstract
Antibodies against small molecules with high titer and high affinity are always pursued in the field of vaccines for drugs of abuse, antidotes to toxins and immunoassays in medical, environmental, and food safety. The exposure degree of the target molecule to the immune system is critical to induce a strongly specific antibody response, thus, the spacer arm length between the target molecule and carrier protein plays an important role. However, the influence of spacer arm length on antibody titer, affinity, and assay performance is not yet clear and highly demanded to be addressed. In the present study, we proposed a model study to answer the question by using two typical small molecules, melamine and p-nitroaniline, which were introduced by varied spacer arms with increasing alkane linear length from 2 to 12 carbon atoms brick by brick. The spacer arm lengths of the haptens were obtained by computational chemistry. The titer and affinity of mouse antisera were analyzed and compared, showing that all haptens with spacer arms of 6-8 carbon atoms, i.e. 6.3-8.8 Å in length, induced strong antibodies represented by the highest titer and affinity without exception, while the haptens with spacer arms of 2-4 carbon atoms and 10-12 carbon atoms, i.e. 1.5-3.9 Å and 11.3-13.9 Å in length, failed to induce high-quality antibody response. Moreover, the titer and sensitivity of the subsequently developed immunoassays were significantly affected by using coating haptens with different spacer arm lengths, and coating haptens with a spacer arm of 6.3-8.8 Å in length delivered the optimum detection performance. The antibody recognition mechanism study further confirmed that the hapten spacer arm length had a critical effect on the recognition properties of the induced antibody, which should be interactive with the spacer arm each other. This study showed that the hapten with appropriate spacer arm length is important to antibody response and immunoassay development, providing a valuable and general clue for the rational design of hapten.
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2
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Guo L, Liu M, Li Q, Dong B, Li H, Mari GM, Liu R, Yu W, Yu X, Wang Z, Zhang S, Shen J, Wen K. Synthesis and characterization of tracers and development of a fluorescence polarization immunoassay for amantadine with high sensitivity in chicken. J Food Sci 2021; 86:4754-4767. [PMID: 34549423 DOI: 10.1111/1750-3841.15896] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Revised: 07/24/2021] [Accepted: 08/02/2021] [Indexed: 12/01/2022]
Abstract
Fluorescence polarization immunoassay (FPIA) is a homogeneous and rapid analytical method that is suitable for high-throughput screening of large numbers of samples. However, FPIA typically suffers from lower sensitivity than the well-established enzyme-linked immunosorbent assay (ELISA), limiting its wide application as an analytical tool that can be run with trace levels of an analyte. Herein, a highly sensitive FPIA for detecting amantadine (AMD) in chicken is described. To achieve high sensitivity, nine chemical tracers of AMD that employ different fluoresceins, fluorescein derivatives, and haptens were synthesized and paired with four previously produced monoclonal antibodies (mAbs). The effect of the tracer structure on the sensitivity of FPIA was investigated and discussed. We found that the tracers with a linear and shorter bridge between adamantane and fluorescein generally provided higher sensitivity. After optimization, N'-(1-adamantyl) ethylenediamine (AEDA), an AMD structural analogue labeled with fluorescein isothiocyanate (FITC), achieved the lowest IC50 value (1.0 ng/ml) in the FPIA, which was comparable to that of the heterologous ELISA format that used the same mAb7G2. We also investigated the possible recognition mechanism of mAbs in terms of conformational and electronic aspects. The developed FPIA was applied to chicken to detect AMD residue, demonstrating a limit of detection (LOD) of 0.9 µg/kg with recoveries of 76.5-89.3% and coefficients of variation (CVs) below 14.5%. These results show that the proposed FPIA is an efficient, accurate, and convenient method for the rapid screening of AMD residues in chicken. PRACTICAL APPLICATION: The fluorescence polarization immunoassay (FPIA) was developed to determine and quantify amantadine (AMD) in chicken samples with high sensitivity. This homogeneous method avoids coating and washing steps and may provide high-throughput AMD screening in chicken in 10 min with high accuracy and precision. FPIA can be used as a monitoring tool and contribute significantly to the rapid detection of AMD in chicken.
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Affiliation(s)
- Liuchuan Guo
- College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food, Beijing Laboratory for Food Quality and Safety, Beijing, People's Republic of China
| | - Meixuan Liu
- College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food, Beijing Laboratory for Food Quality and Safety, Beijing, People's Republic of China
| | - Qiang Li
- College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food, Beijing Laboratory for Food Quality and Safety, Beijing, People's Republic of China
| | - Baolei Dong
- College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food, Beijing Laboratory for Food Quality and Safety, Beijing, People's Republic of China
| | - Hongfang Li
- College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food, Beijing Laboratory for Food Quality and Safety, Beijing, People's Republic of China
| | - Ghulam Mujtaba Mari
- College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food, Beijing Laboratory for Food Quality and Safety, Beijing, People's Republic of China
| | - Rui Liu
- College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food, Beijing Laboratory for Food Quality and Safety, Beijing, People's Republic of China
| | - Wenbo Yu
- College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food, Beijing Laboratory for Food Quality and Safety, Beijing, People's Republic of China
| | - Xuezhi Yu
- College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food, Beijing Laboratory for Food Quality and Safety, Beijing, People's Republic of China
| | - Zhanhui Wang
- College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food, Beijing Laboratory for Food Quality and Safety, Beijing, People's Republic of China
| | - Suxia Zhang
- College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food, Beijing Laboratory for Food Quality and Safety, Beijing, People's Republic of China
| | - Jianzhong Shen
- College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food, Beijing Laboratory for Food Quality and Safety, Beijing, People's Republic of China
| | - Kai Wen
- College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food, Beijing Laboratory for Food Quality and Safety, Beijing, People's Republic of China
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3
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Bhowmick A, Warghude PK, Dharpure PD, Bhat RG. Direct access to α-acyloxycarbonyl compounds and esters via oxidative esterification of aldehydes under visible light. Org Chem Front 2021. [DOI: 10.1039/d1qo00731a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
An efficient synthesis of α-acyloxycarbonyl compounds and esters from aldehydes and α-bromocarbonyl compounds/benzyl bromide derivatives via photoredox catalysis has been developed.
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Affiliation(s)
- Anindita Bhowmick
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Pune, Dr. Homi Bhabha Road, Pashan, 411008, Maharashtra, India
| | - Prakash K. Warghude
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Pune, Dr. Homi Bhabha Road, Pashan, 411008, Maharashtra, India
| | - Pankaj D. Dharpure
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Pune, Dr. Homi Bhabha Road, Pashan, 411008, Maharashtra, India
| | - Ramakrishna G. Bhat
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Pune, Dr. Homi Bhabha Road, Pashan, 411008, Maharashtra, India
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4
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Donabauer K, Murugesan K, Rozman U, Crespi S, König B. Photocatalytic Reductive Radical-Polar Crossover for a Base-Free Corey-Seebach Reaction. Chemistry 2020; 26:12945-12950. [PMID: 32686166 PMCID: PMC7589390 DOI: 10.1002/chem.202003000] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 07/15/2020] [Indexed: 01/07/2023]
Abstract
A metal-free generation of carbanion nucleophiles is of prime importance in organic synthesis. Herein we report a photocatalytic approach to the Corey-Seebach reaction. The presented method operates under mild redox-neutral and base-free conditions giving the desired product with high functional group tolerance. The reaction is enabled by the combination of photo- and hydrogen atom transfer (HAT) catalysis. This catalytic merger allows a C-H to carbanion activation by the abstraction of a hydrogen atom followed by radical reduction. The generated nucleophilic intermediate is then capable of adding to carbonyl electrophiles. The obtained dithiane can be easily converted to the valuable α-hydroxy carbonyl in a subsequent step. The proposed reaction mechanism is supported by emission quenching, radical-radical homocoupling and deuterium labeling studies as well as by calculated redox-potentials and bond strengths.
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Affiliation(s)
- Karsten Donabauer
- Department of Organic ChemistryUniversity of RegensburgUniversitätsstraße 3193053RegensburgGermany
| | - Kathiravan Murugesan
- Department of Organic ChemistryUniversity of RegensburgUniversitätsstraße 3193053RegensburgGermany
| | - Urša Rozman
- Department of Organic ChemistryUniversity of RegensburgUniversitätsstraße 3193053RegensburgGermany
| | - Stefano Crespi
- Stratingh Institute for ChemistryUniversity of GroningenNijenborgh 49747 AGGroningenThe Netherlands
| | - Burkhard König
- Department of Organic ChemistryUniversity of RegensburgUniversitätsstraße 3193053RegensburgGermany
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5
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Bityukov OV, Matveeva OK, Vil’ VA, Kokorekin VA, Nikishin GI, Terent’ev AO. Electrochemically Induced Intermolecular Cross-Dehydrogenative C–O Coupling of β-Diketones and β-Ketoesters with Carboxylic Acids. J Org Chem 2019; 84:1448-1460. [DOI: 10.1021/acs.joc.8b02791] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Oleg V. Bityukov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., Moscow 119991, Russian Federation
| | - Olesya K. Matveeva
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., Moscow 119991, Russian Federation
- D. I. Mendeleev University of Chemical Technology of Russia, 9 Miusskaya Square, Moscow 125047, Russian Federation
| | - Vera A. Vil’
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., Moscow 119991, Russian Federation
| | - Vladimir A. Kokorekin
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., Moscow 119991, Russian Federation
- Sechenov First Moscow State Medical University, Trubetskaya st. 8-2, Moscow 119991, Russian Federation
| | - Gennady I. Nikishin
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., Moscow 119991, Russian Federation
| | - Alexander O. Terent’ev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., Moscow 119991, Russian Federation
- D. I. Mendeleev University of Chemical Technology of Russia, 9 Miusskaya Square, Moscow 125047, Russian Federation
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6
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Li C, Liang X, Wen K, Li Y, Zhang X, Ma M, Yu X, Yu W, Shen J, Wang Z. Class-Specific Monoclonal Antibodies and Dihydropteroate Synthase in Bioassays Used for the Detection of Sulfonamides: Structural Insights into Recognition Diversity. Anal Chem 2018; 91:2392-2400. [DOI: 10.1021/acs.analchem.8b05174] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Chenglong Li
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agricultural University, 100193 Beijing, People’s Republic of China
- Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, Beijing Laboratory of Food Quality and Safety, Beijing Municipal Education Commission, 100193 Beijing, People’s Republic of China
| | - Xiao Liang
- College of Veterinary Medicine, Qingdao Agricultural University, 266109 Qingdao, People’s Republic of China
| | - Kai Wen
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agricultural University, 100193 Beijing, People’s Republic of China
- Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, Beijing Laboratory of Food Quality and Safety, Beijing Municipal Education Commission, 100193 Beijing, People’s Republic of China
| | - Yonghan Li
- Henan Animal Health Supervision Institute, 450008 Zhengzhou, People’s Republic of China
| | - Xiya Zhang
- College of Food Science and Technology, Henan Agricultural University, 450002 Zhengzhou, People’s Republic of China
| | - Mingfang Ma
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agricultural University, 100193 Beijing, People’s Republic of China
- Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, Beijing Laboratory of Food Quality and Safety, Beijing Municipal Education Commission, 100193 Beijing, People’s Republic of China
| | - Xuezhi Yu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agricultural University, 100193 Beijing, People’s Republic of China
- Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, Beijing Laboratory of Food Quality and Safety, Beijing Municipal Education Commission, 100193 Beijing, People’s Republic of China
| | - Wenbo Yu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agricultural University, 100193 Beijing, People’s Republic of China
- Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, Beijing Laboratory of Food Quality and Safety, Beijing Municipal Education Commission, 100193 Beijing, People’s Republic of China
| | - Jianzhong Shen
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agricultural University, 100193 Beijing, People’s Republic of China
- Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, Beijing Laboratory of Food Quality and Safety, Beijing Municipal Education Commission, 100193 Beijing, People’s Republic of China
| | - Zhanhui Wang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agricultural University, 100193 Beijing, People’s Republic of China
- Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, Beijing Laboratory of Food Quality and Safety, Beijing Municipal Education Commission, 100193 Beijing, People’s Republic of China
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7
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Wang C, Li X, Peng T, Wang Z, Wen K, Jiang H. Latex bead and colloidal gold applied in a multiplex immunochromatographic assay for high-throughput detection of three classes of antibiotic residues in milk. Food Control 2017. [DOI: 10.1016/j.foodcont.2017.01.016] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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8
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Wang Z, Beier RC, Shen J. Immunoassays for the detection of macrocyclic lactones in food matrices – A review. Trends Analyt Chem 2017. [DOI: 10.1016/j.trac.2017.04.008] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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9
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Li Z, Li Z, Zhao D, Wen F, Jiang J, Xu D. Smartphone-based visualized microarray detection for multiplexed harmful substances in milk. Biosens Bioelectron 2017; 87:874-880. [DOI: 10.1016/j.bios.2016.09.046] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Revised: 09/04/2016] [Accepted: 09/13/2016] [Indexed: 11/24/2022]
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10
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Terent’ev AO, Vil’ VA, Gorlov ES, Nikishin GI, Pivnitsky KK, Adam W. Lanthanide-Catalyzed Oxyfunctionalization of 1,3-Diketones, Acetoacetic Esters, And Malonates by Oxidative C–O Coupling with Malonyl Peroxides. J Org Chem 2016; 81:810-23. [DOI: 10.1021/acs.joc.5b02233] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Alexander O. Terent’ev
- N.
D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prospekt, Moscow 119991, Russian Federation
| | - Vera A. Vil’
- N.
D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prospekt, Moscow 119991, Russian Federation
| | - Evgenii S. Gorlov
- N.
D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prospekt, Moscow 119991, Russian Federation
| | - Gennady I. Nikishin
- N.
D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prospekt, Moscow 119991, Russian Federation
| | - Kasimir K. Pivnitsky
- N.
D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prospekt, Moscow 119991, Russian Federation
| | - Waldemar Adam
- Institute
of Organic Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany
- Department
of Chemistry, Facundo Bueso 110, University of Puerto Rico, Rio Piedras, Puerto Rico 00931, United States
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11
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Jiang W, Beier RC, Luo P, Zhai P, Wu N, Lin G, Wang X, Xu G. Analysis of Pirlimycin Residues in Beef Muscle, Milk, and Honey by a Biotin-Streptavidin-Amplified Enzyme-Linked Immunosorbent Assay. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2016; 64:364-370. [PMID: 26671277 DOI: 10.1021/acs.jafc.5b05711] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Food contamination by veterinary drug residues is a worldwide public health concern and requires continuous monitoring. In this study, we developed a biotin-streptavidin-amplified ELISA (BA-ELISA) using a produced monoclonal antibody for detecting pirlimycin residues in beef muscle, milk, and honey. The IC50 value of the BA-ELISA was 1.6 ng/mL for pirlimycin in buffer, and the sensitivity was improved 3 times compared to traditional ELISAs. The optimized BA-ELISA can be used to quantitate trace amounts of pirlimycin residues in beef muscle, milk, and honey. This method had limits of detection (LODs) of 4.45 μg/kg in beef muscle, 1.65 μg/L in milk, and 2.75 μg/kg in honey. The average recovery of the BA-ELISA ranged from 78 to 97%, and the coefficient of variation ranged from 5.3 to 13.5%. The developed BA-ELISA method was validated using LC-MS/MS, and the BA-ELISA can be used for routine screening analysis of pirlimycin residues.
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Affiliation(s)
- Wenxiao Jiang
- School of Medicine, Health Science Center, Shenzhen University , Shenzhen 518060, China
| | - Ross C Beier
- Food and Feed Safety Research Unit, Southern Plains Agricultural Research Center, Agricultural Research Service, U.S. Department of Agriculture , 2881 F&B Road, College Station, Texas 77845, United States
| | - Pengjie Luo
- Key Laboratory of Food Safety Risk Assessment, Ministry of Health, China National Center for Food Safety Risk Assessment , Beijing 100021, China
| | - Peng Zhai
- School of Medicine, Health Science Center, Shenzhen University , Shenzhen 518060, China
| | - Nan Wu
- Key Laboratory of Food Safety Risk Assessment, Ministry of Health, China National Center for Food Safety Risk Assessment , Beijing 100021, China
| | - Guimiao Lin
- School of Medicine, Health Science Center, Shenzhen University , Shenzhen 518060, China
| | - Xiaomei Wang
- School of Medicine, Health Science Center, Shenzhen University , Shenzhen 518060, China
| | - Gaixia Xu
- Institute of Optoelectronics, Department of Optoelectronic Information Science and Engineering, Shenzhen University , Shenzhen 518060, China
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