1
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Dubey Y, Mansuri S, Kanvah S. Detecting labile heme and ferroptosis through 'turn-on' fluorescence and lipid droplet localization post Fe 2+ sensing. J Mater Chem B 2024; 12:4962-4974. [PMID: 38687117 DOI: 10.1039/d4tb00353e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
Iron, a crucial biologically active ion essential for metabolic processes in living organisms, plays a vital role in biological functions, and imbalances in iron levels can lead to various diseases. In this study, we have developed two simple "turn-on" fluorescent probes, NOPy and NOCN, for the quick and selective detection of Fe2+ at nanomolar levels (LOD of 35 nM), accompanied by significant absorption and emission shifts, along with colorimetric demarcation. Both fluorophores exhibit an excellent "turn-on" emission response upon encountering Fe2+ in the cells. Flow cytometry and confocal fluorescence imaging studies demonstrate enhanced fluorescence signals in response to labile iron, efficiently detecting heme during erastin-induced ferroptosis. Interestingly, we also observed that the product formed after Fe2+ sensing localizes within the lipid droplets. These water-soluble and highly sensitive reactive probes, NOPy and NOCN, enable investigations of iron-dependent physiological and pathological conditions. The development of these probes represents an advancement in the field, offering a rapid and selective means for detecting Fe2+ with minimal cytotoxicity.
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Affiliation(s)
- Yogesh Dubey
- Department of Chemistry, Indian Institute of Technology Gandhinagar, Palaj, Gandhinagar, Gujarat-382055, India.
| | - Shabnam Mansuri
- Department of Chemistry, Indian Institute of Technology Gandhinagar, Palaj, Gandhinagar, Gujarat-382055, India.
| | - Sriram Kanvah
- Department of Chemistry, Indian Institute of Technology Gandhinagar, Palaj, Gandhinagar, Gujarat-382055, India.
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2
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Dubey Y, Mahalingavelar P, Rajput D, Shewale DJ, Soppina V, Kanvah S. Fluorescent styryl pyridine- N-oxide probes for imaging lipid droplets. Org Biomol Chem 2023; 21:8393-8402. [PMID: 37819137 DOI: 10.1039/d3ob01365k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/13/2023]
Abstract
Lipid droplets (LDs) have emerged as major regulators of cellular metabolism, encompassing lipid storage, membrane synthesis, viral replication, and protein degradation. Exclusive studies have suggested a direct link between LDs and cancer, as a notable abundance of LDs is found in cancerous cells. Therefore, monitoring the location, distribution, and movements of LDs is of paramount importance for understanding their involvement in biological processes. To target LDs, we designed and synthesized fluorophores with a styryl scaffold bearing electron-donating amino groups and pyridine-N-oxide, a zwitterionic acceptor moiety. We explored their photophysical properties in various solvents and conducted systematic DFT calculations on the synthesized fluorescent molecules, comparing them with neutral pyridine and cationic pyridinium styryl dyes. The results demonstrate that diphenylaminostyryl pyridine-N-oxide (TNO) shows excellent imaging of LDs, in contrast to the behavior of cationic styrylpyridinium (TNC), which primarily localizes within the mitochondria. Notably, pyridine N-oxide offers several benefits: an increased dipole moment facilitating charge separation between donors and acceptors, substantial HOMO and LUMO stabilization, improved water solubility, favorable redox properties, and bathochromic-shifted absorption/emission spectra, showing promise as a fluorescent tool for probing the cellular-biological realm.
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Affiliation(s)
- Yogesh Dubey
- Department of Chemistry, Indian Institute of Technology Gandhinagar, Palaj, Gandhinagar, Gujarat-382055, India.
| | | | - Deeksha Rajput
- Department of Chemistry, Indian Institute of Technology Gandhinagar, Palaj, Gandhinagar, Gujarat-382055, India.
| | - Dipeshwari J Shewale
- Department of Biological Engineering, Indian Institute of Technology Gandhinagar, Palaj, Gandhinagar, Gujarat-382055, India.
| | - Virupakshi Soppina
- Department of Biological Engineering, Indian Institute of Technology Gandhinagar, Palaj, Gandhinagar, Gujarat-382055, India.
| | - Sriram Kanvah
- Department of Chemistry, Indian Institute of Technology Gandhinagar, Palaj, Gandhinagar, Gujarat-382055, India.
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3
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Fan L, Li W, Jia D, Zhang W, Ding Y. Pattern Recognition and Visual Detection of Aldehydes Using a Single ESIPT Dye. Anal Chem 2023; 95:12284-12289. [PMID: 37556792 DOI: 10.1021/acs.analchem.3c01231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/11/2023]
Abstract
The accurate discrimination and quantification of aldehydes is a worthy objective made challenging by their similar chemical reactivities. Considering the nucleophilic reaction mechanism between an aldehyde and a primary amine, it is reasonable to vary the reaction pH to manipulate the reactivity of aldehydes and the stability of the resulting Schiff base for analytical purposes. We have designed and synthesized three benzothiazole-based fluorescent molecules (BS1-BS3) containing an amino group substituted at the ortho-, meta-, and para-positions for aldehyde sensing. It was determined that only BS1 having an amino group at the ortho-position exhibits a significant fluorescence response in the presence of formaldehyde at a particular pH, whereas BS2 and BS3 gave negligible responses, indicating that the ESIPT process in BS1 should be responsible for the changes in its fluorescence. Accordingly, a pH-mediated sensor array BS1SA was constructed by dissolving BS1 in aqueous solvents with different pH values. BS1SA was found to be reliable for the discrimination of seven different aldehydes and identification of unknown aldehyde samples. Moreover, BS1 was successfully applied to prepare a fluorescent test paper for the visual detection of formaldehyde vapor.
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Affiliation(s)
- Liangfei Fan
- Department of Chemistry, College of Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Weiyi Li
- Department of Chemistry, College of Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Dongmin Jia
- Department of Chemistry, College of Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Weihua Zhang
- Department of Chemistry, College of Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Yubin Ding
- Department of Chemistry, College of Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
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Che S, Yin L, Chen M, Fan Y, Xu A, Zhou C, Fu H, She Y. Real-time monitoring of mercury(II) in water and food samples using a quinoline-based ionic probe. Food Chem 2023; 407:135052. [PMID: 36493472 DOI: 10.1016/j.foodchem.2022.135052] [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: 01/04/2022] [Revised: 11/19/2022] [Accepted: 11/21/2022] [Indexed: 11/24/2022]
Abstract
Herein, a novel ionic fluorescent probe for mercury(II) detection is presented consisting of a functional quinoline-based IL. Interestingly, the probe displayed high sensitivity (0.8 nM) and selectivity through the regulation function of electrostatic attraction, where its performance was significantly superior to that of quinoline probes without negative charge. Furthermore, the probe was found to exhibit two different fluorescent signals and colorimetric signals in the presence of different concentrations of mercury(II), which was consistent with the reaction mechanisms of the generation of large conjugated systems and the formation of anion-mercury(II) complexes. Moreover, this probe could be further loaded on a simple filter paper to serve as a visual paper sensor due to its adequate response time of less than 5 s. This regulation function strategy of electrostatic attraction has excellent potential for use in the precise detection of targeted analytes in real complex samples with improved accuracy and selectivity.
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Affiliation(s)
- Siying Che
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Linlin Yin
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, PR China; Jiaxing Ctr Dis Control & Prevent, Jiaxing 314050, PR China
| | - Ming Chen
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Yao Fan
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Anni Xu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Chunsong Zhou
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Haiyan Fu
- The Modernization Engineering Technology Research Center of Ethnic Minority Medicine of Hubei Province, College of Pharmacy, South-Central University for Nationalities, Wuhan 430074, PR China.
| | - Yuanbin She
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, PR China.
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5
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Savita, Nandikolla A, Shukla AK, Chandra Sekhar KVG, Bhattacharya A. Visible light sensing of ions by a cyanoquinoxaline 1,4-dioxide-based probe and its applications. Dalton Trans 2023; 52:4103-4111. [PMID: 36883321 DOI: 10.1039/d2dt04143j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
Inducting newer fluorophores for colourimetry/fluorimetry-assisted analyte sensing is of great importance. Towards this end, we have shown the application of quinoxaline-1,4-dioxide bioactive molecules for the first time as potential probes for cations and anions. The molecule (ACQ) used in this study is soluble in water and provides specific colour output upon interaction with copper and palladium ions. Changing the solvent to DMSO allows a change in selectivity to fluoride ions via pink to blue colour change. All the ions detected showed quenching of the fluorescence signal upon interaction with the probe. Analysis of the Stern-Volmer plot indicated the predominant role of static quenching in the selective ion-sensing behaviour of the probe. The stoichiometry of the ACQ and ion was 2 : 1 in the case of Cu2+ and Pd2+, whereas a ratio of 1 : 1 was seen in the case of F-. We have also applied ACQ to probe the above-mentioned analytes in practical settings.
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Affiliation(s)
- Savita
- Department of Chemistry, Birla Institute of Technology and Science-Pilani (Hyderabad Campus), Hyderabad-500078, India.
| | - Adinarayana Nandikolla
- Department of Chemistry, Birla Institute of Technology and Science-Pilani (Hyderabad Campus), Hyderabad-500078, India.
| | - Adarash Kumar Shukla
- Department of Chemistry, Birla Institute of Technology and Science-Pilani (Hyderabad Campus), Hyderabad-500078, India.
| | | | - Anupam Bhattacharya
- Department of Chemistry, Birla Institute of Technology and Science-Pilani (Hyderabad Campus), Hyderabad-500078, India.
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6
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Recent advances in colorimetric and fluorometric sensing of neurotransmitters by organic scaffolds. Eur J Med Chem 2022; 244:114820. [DOI: 10.1016/j.ejmech.2022.114820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 09/22/2022] [Accepted: 09/30/2022] [Indexed: 11/22/2022]
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7
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Wang Y, Gao H, Gong C, Rizvi SFA, Liu X, Shi X, Zhang H, Wu L. N-quaternization of heterocyclic compound extended the emission to NIR with large Stokes shift and its application in constructing fluorescent probe. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 267:120566. [PMID: 34799226 DOI: 10.1016/j.saa.2021.120566] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 10/14/2021] [Accepted: 10/27/2021] [Indexed: 06/13/2023]
Abstract
This is great significant to establish a method that extends the small molecules fluorescence emission wavelength to the near-infrared region (NIR) for in vivo imaging. Hence, we firstly reported a novel fluorogenic scaffold QOH that could extend its fluorescence wavelength from (λem = 555 nm) to NIR (λem = 720 nm) with a large Stokes shift (120 nm) by forming its N-quaternization product (QMOH). In addition, the effect of the introduction of substituent at different modification sites and the properties of substituent on the optical properties of QOH were fully discussed by theoretical calculation. To investigate the possibility of QOH as probe construction, the compound Q-SH and QM-R were synthesized and applied to detect H2S and H2O2 in vitro and in vivo, respectively. This study provided an efficient strategy to extend fluorescence emission to NIR and design fluorescence probes with large ratio variation for accurately imaging biomarkers in biological system.
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Affiliation(s)
- Yaya Wang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Hong Gao
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Can Gong
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Syed Faheem Askari Rizvi
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Xiaoyan Liu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Xuezhao Shi
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Haixia Zhang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China.
| | - Lan Wu
- College of Chemical Engineering, Northwest Minzu University, Lanzhou, Gansu 730030, China
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Sokolov AV, Vologzhanina AVV, Sudakova TV, Popova YV, Alexandrov EV. Design and Synthesis of Coordination Polymers with Cu(II) and Heterocyclic N-Oxides. CrystEngComm 2022. [DOI: 10.1039/d2ce00139j] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The relations of coordination network connectivity with coordination properties of heterocyclic N-oxides, Cu(I,II), and co-ligands were discussed based on the comparative analysis of 623 structures extracted from the Cambridge Structural...
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Du Y, Zhang Y, Huang M, Wang S, Wang J, Liao K, Wu X, Zhou Q, Zhang X, Wu YD, Peng T. Systematic investigation of the aza-Cope reaction for fluorescence imaging of formaldehyde in vitro and in vivo. Chem Sci 2021; 12:13857-13869. [PMID: 34760171 PMCID: PMC8549814 DOI: 10.1039/d1sc04387k] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Accepted: 09/22/2021] [Indexed: 01/02/2023] Open
Abstract
Increasing evidence has highlighted the endogenous production of formaldehyde (FA) in a variety of fundamental biological processes and its involvement in many disease conditions ranging from cancer to neurodegeneration. To examine the physiological and pathological relevance and functions of FA, fluorescent probes for FA imaging in live biological samples are of great significance. Herein we report a systematic investigation of 2-aza-Cope reactions between homoallylamines and FA for identification of a highly efficient 2-aza-Cope reaction moiety and development of fluorescent probes for imaging FA in living systems. By screening a set of N-substituted homoallylamines and comparing them to previously reported homoallylamine structures for reaction with FA, we found that N-p-methoxybenzyl homoallylamine exhibited an optimal 2-aza-Cope reactivity to FA. Theoretical calculations were then performed to demonstrate that the N-substituent on homoallylamine greatly affects the condensation with FA, which is more likely the rate-determining step. Moreover, the newly identified optimal N-p-methoxybenzyl homoallylamine moiety with a self-immolative β-elimination linker was generally utilized to construct a series of fluorescent probes with varying excitation/emission wavelengths for sensitive and selective detection of FA in aqueous solutions and live cells. Among these probes, the near-infrared probe FFP706 has been well demonstrated to enable direct fluorescence visualization of steady-state endogenous FA in live mouse brain tissues and elevated FA levels in a mouse model of breast cancer. This study provides the optimal aza-Cope reaction moiety for FA probe development and new chemical tools for fluorescence imaging and biological investigation of FA in living systems.
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Affiliation(s)
- Yimeng Du
- State Key Laboratory of Chemical Oncogenomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School Shenzhen 518055 China
| | - Yuqing Zhang
- State Key Laboratory of Chemical Oncogenomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School Shenzhen 518055 China
| | - Meirong Huang
- State Key Laboratory of Chemical Oncogenomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School Shenzhen 518055 China
| | - Shushu Wang
- State Key Laboratory of Chemical Oncogenomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School Shenzhen 518055 China
| | - Jianzheng Wang
- State Key Laboratory of Chemical Oncogenomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School Shenzhen 518055 China
| | - Kongke Liao
- State Key Laboratory of Chemical Oncogenomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School Shenzhen 518055 China
| | - Xiaojun Wu
- State Key Laboratory of Chemical Oncogenomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School Shenzhen 518055 China
| | - Qiang Zhou
- State Key Laboratory of Chemical Oncogenomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School Shenzhen 518055 China
| | - Xinhao Zhang
- State Key Laboratory of Chemical Oncogenomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School Shenzhen 518055 China
- Shenzhen Bay Laboratory Shenzhen 518132 China
| | - Yun-Dong Wu
- State Key Laboratory of Chemical Oncogenomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School Shenzhen 518055 China
- Shenzhen Bay Laboratory Shenzhen 518132 China
| | - Tao Peng
- State Key Laboratory of Chemical Oncogenomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School Shenzhen 518055 China
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Petkevičius V, Vaitekūnas J, Gasparavičiūtė R, Tauraitė D, Meškys R. An efficient and regioselective biocatalytic synthesis of aromatic N-oxides by using a soluble di-iron monooxygenase PmlABCDEF produced in the Pseudomonas species. Microb Biotechnol 2021; 14:1771-1783. [PMID: 34115446 PMCID: PMC8313251 DOI: 10.1111/1751-7915.13849] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 04/26/2021] [Accepted: 05/19/2021] [Indexed: 11/27/2022] Open
Abstract
Here, we present an improved whole-cell biocatalysis system for the synthesis of heteroaromatic N-oxides based on the production of a soluble di-iron monooxygenase PmlABCDEF in Pseudomonas sp. MIL9 and Pseudomonas putida KT2440. The presented biocatalysis system performs under environmentally benign conditions, features a straightforward and inexpensive procedure and possesses a high substrate conversion and product yield. The capacity of gram-scale production was reached in the simple shake-flask cultivation. The template substrates (pyridine, pyrazine, 2-aminopyrimidine) have been converted into pyridine-1-oxide, pyrazine-1-oxide and 2-aminopyrimidine-1-oxide in product titres of 18.0, 19.1 and 18.3 g l-1 , respectively. To our knowledge, this is the highest reported productivity of aromatic N-oxides using biocatalysis methods. Moreover, comparing to the chemical method of aromatic N-oxides synthesis based on meta-chloroperoxybenzoic acid, the developed approach is applicable for a regioselective oxidation that is an additional advantageous option in the preparation of the anticipated N-oxides.
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Affiliation(s)
- Vytautas Petkevičius
- Department of Molecular Microbiology and BiotechnologyInstitute of BiochemistryLife Sciences CenterVilnius UniversitySaulėtekio 7VilniusLT‐10257Lithuania
| | - Justas Vaitekūnas
- Department of Molecular Microbiology and BiotechnologyInstitute of BiochemistryLife Sciences CenterVilnius UniversitySaulėtekio 7VilniusLT‐10257Lithuania
| | - Renata Gasparavičiūtė
- Department of Molecular Microbiology and BiotechnologyInstitute of BiochemistryLife Sciences CenterVilnius UniversitySaulėtekio 7VilniusLT‐10257Lithuania
| | - Daiva Tauraitė
- Department of Molecular Microbiology and BiotechnologyInstitute of BiochemistryLife Sciences CenterVilnius UniversitySaulėtekio 7VilniusLT‐10257Lithuania
| | - Rolandas Meškys
- Department of Molecular Microbiology and BiotechnologyInstitute of BiochemistryLife Sciences CenterVilnius UniversitySaulėtekio 7VilniusLT‐10257Lithuania
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