Alexander Sobolevsky - Publications

Affiliations: 
Biochemistry and Molecular Biophysics Columbia University, New York, NY 

83 high-probability publications. We are testing a new system for linking publications to authors. You can help! If you notice any inaccuracies, please sign in and mark papers as correct or incorrect matches. If you identify any major omissions or other inaccuracies in the publication list, please let us know.

Year Citation  Score
2024 Trofimov YA, Krylov NA, Minakov AS, Nadezhdin KD, Neuberger A, Sobolevsky AI, Efremov RG. Dynamic molecular portraits of ion-conducting pores characterize functional states of TRPV channels. Communications Chemistry. 7: 119. PMID 38824263 DOI: 10.1038/s42004-024-01198-z  0.455
2024 Gangwar SP, Yelshanskaya MV, Nadezhdin KD, Yen LY, Newton TP, Aktolun M, Kurnikova MG, Sobolevsky AI. Kainate receptor channel opening and gating mechanism. Nature. PMID 38778115 DOI: 10.1038/s41586-024-07475-0  0.775
2024 Nadezhdin KD, Neuberger A, Khosrof LS, Talyzina IA, Khau J, Yelshanskaya MV, Sobolevsky AI. TRPV3 activation by different agonists accompanied by lipid dissociation from the vanilloid site. Science Advances. 10: eadn2453. PMID 38691614 DOI: 10.1126/sciadv.adn2453  0.451
2024 Nadezhdin KD, Correia L, Shalygin A, Aktolun M, Neuberger A, Gudermann T, Kurnikova MG, Chubanov V, Sobolevsky AI. Structural basis of selective TRPM7 inhibition by the anticancer agent CCT128930. Cell Reports. 43: 114108. PMID 38615321 DOI: 10.1016/j.celrep.2024.114108  0.663
2023 Vukolova MN, Yen LY, Khmyz MI, Sobolevsky AI, Yelshanskaya MV. Parkinson's disease, epilepsy, and amyotrophic lateral sclerosis-emerging role of AMPA and kainate subtypes of ionotropic glutamate receptors. Frontiers in Cell and Developmental Biology. 11: 1252953. PMID 38033869 DOI: 10.3389/fcell.2023.1252953  0.414
2023 Neuberger A, Sobolevsky AI. Molecular pharmacology of the onco-TRP channel TRPV6. Channels (Austin, Tex.). 17: 2266669. PMID 37838981 DOI: 10.1080/19336950.2023.2266669  0.388
2023 Neuberger A, Sobolevsky AI. Pentameric TRPV3: An artifact or a clue to channel function? Cell Calcium. 116: 102812. PMID 37804687 DOI: 10.1016/j.ceca.2023.102812  0.378
2023 Gangwar SP, Yen LY, Yelshanskaya MV, Korman A, Jones DR, Sobolevsky AI. Modulation of GluA2-γ5 synaptic complex desensitization, polyamine block and antiepileptic perampanel inhibition by auxiliary subunit cornichon-2. Nature Structural & Molecular Biology. PMID 37653241 DOI: 10.1038/s41594-023-01080-x  0.498
2023 Neuberger A, Trofimov YA, Yelshanskaya MV, Khau J, Nadezhdin KD, Khosrof LS, Krylov NA, Efremov RG, Sobolevsky AI. Molecular pathway and structural mechanism of human oncochannel TRPV6 inhibition by the phytocannabinoid tetrahydrocannabivarin. Nature Communications. 14: 4630. PMID 37532722 DOI: 10.1038/s41467-023-40362-2  0.34
2023 Nadezhdin KD, Talyzina IA, Parthasarathy A, Neuberger A, Zhang DX, Sobolevsky AI. Structure of human TRPV4 in complex with GTPase RhoA. Nature Communications. 14: 3733. PMID 37353478 DOI: 10.1038/s41467-023-39346-z  0.392
2023 Neuberger A, Trofimov YA, Yelshanskaya MV, Nadezhdin KD, Krylov NA, Efremov RG, Sobolevsky AI. Structural mechanism of human oncochannel TRPV6 inhibition by the natural phytoestrogen genistein. Nature Communications. 14: 2659. PMID 37160865 DOI: 10.1038/s41467-023-38352-5  0.409
2023 Nadezhdin KD, Correia L, Narangoda C, Patel DS, Neuberger A, Gudermann T, Kurnikova MG, Chubanov V, Sobolevsky AI. Structural mechanisms of TRPM7 activation and inhibition. Nature Communications. 14: 2639. PMID 37156763 DOI: 10.1038/s41467-023-38362-3  0.667
2023 Neuberger A, Oda M, Nikolaev YA, Nadezhdin KD, Gracheva EO, Bagriantsev SN, Sobolevsky AI. Human TRPV1 structure and inhibition by the analgesic SB-366791. Nature Communications. 14: 2451. PMID 37117175 DOI: 10.1038/s41467-023-38162-9  0.33
2023 Gangwar SP, Yen LY, Yelshanskaya MV, Sobolevsky AI. Positive and negative allosteric modulation of GluK2 kainate receptors by BPAM344 and antiepileptic perampanel. Cell Reports. 42: 112124. PMID 36857176 DOI: 10.1016/j.celrep.2023.112124  0.539
2022 Yelshanskaya MV, Sobolevsky AI. Ligand-Binding Sites in Vanilloid-Subtype TRP Channels. Frontiers in Pharmacology. 13: 900623. PMID 35652046 DOI: 10.3389/fphar.2022.900623  0.456
2022 Nadezhdin KD, Neuberger A, Sobolevsky AI. Structural snapshots of the mechanism of TRPV2 channel activation by small-molecule agonists. Cell Calcium. 105: 102607. PMID 35636151 DOI: 10.1016/j.ceca.2022.102607  0.446
2022 Neuberger A, Nadezhdin KD, Sobolevsky AI. Structural mechanism of TRPV3 channel inhibition by the anesthetic dyclonine. Nature Communications. 13: 2795. PMID 35589741 DOI: 10.1038/s41467-022-30537-8  0.416
2022 Yelshanskaya MV, Patel DS, Kottke CM, Kurnikova MG, Sobolevsky AI. Opening of glutamate receptor channel to subconductance levels. Nature. 605: 172-178. PMID 35444281 DOI: 10.1038/s41586-022-04637-w  0.737
2021 Hansen KB, Wollmuth LP, Bowie D, Furukawa H, Menniti FS, Sobolevsky AI, Swanson GT, Swanger SA, Greger IH, Nakagawa T, McBain CJ, Jayaraman V, Low CM, Dell'Acqua ML, Diamond JS, et al. Structure, Function, and Pharmacology of Glutamate Receptor Ion Channels. Pharmacological Reviews. 73: 298-487. PMID 34753794 DOI: 10.1124/pharmrev.120.000131  0.767
2021 Neuberger A, Nadezhdin KD, Sobolevsky AI. Structural mechanisms of TRPV6 inhibition by ruthenium red and econazole. Nature Communications. 12: 6284. PMID 34725357 DOI: 10.1038/s41467-021-26608-x  0.436
2021 Klykov O, Gangwar SP, Yelshanskaya MV, Yen L, Sobolevsky AI. Structure and desensitization of AMPA receptor complexes with type II TARP γ5 and GSG1L. Molecular Cell. PMID 34678168 DOI: 10.1016/j.molcel.2021.09.030  0.421
2021 Gangwar SP, Green MN, Yelshanskaya MV, Sobolevsky AI. Purification and cryo-EM structure determination of GLR3.4. Star Protocols. 2: 100855. PMID 34647037 DOI: 10.1016/j.xpro.2021.100855  0.506
2021 Neuberger A, Nadezhdin KD, Zakharian E, Sobolevsky AI. Structural mechanism of TRPV3 channel inhibition by the plant-derived coumarin osthole. Embo Reports. e53233. PMID 34472684 DOI: 10.15252/embr.202153233  0.42
2021 Nadezhdin KD, Neuberger A, Trofimov YA, Krylov NA, Sinica V, Kupko N, Vlachova V, Zakharian E, Efremov RG, Sobolevsky AI. Structural mechanism of heat-induced opening of a temperature-sensitive TRP channel. Nature Structural & Molecular Biology. PMID 34239124 DOI: 10.1038/s41594-021-00615-4  0.327
2021 Green MN, Gangwar SP, Michard E, Simon AA, Portes MT, Barbosa-Caro J, Wudick MM, Lizzio MA, Klykov O, Yelshanskaya MV, Feijó JA, Sobolevsky AI. Structure of the Arabidopsis thaliana glutamate receptor-like channel GLR3.4. Molecular Cell. PMID 34161757 DOI: 10.1016/j.molcel.2021.05.025  0.457
2021 Neuberger A, Nadezhdin KD, Sobolevsky AI. TRPV3 expression and purification for structure determination by Cryo-EM. Methods in Enzymology. 652: 31-48. PMID 34059288 DOI: 10.1016/bs.mie.2021.02.006  0.386
2021 Nadezhdin KD, Neuberger A, Nikolaev YA, Murphy LA, Gracheva EO, Bagriantsev SN, Sobolevsky AI. Extracellular cap domain is an essential component of the TRPV1 gating mechanism. Nature Communications. 12: 2154. PMID 33846324 DOI: 10.1038/s41467-021-22507-3  0.425
2020 Bhardwaj R, Lindinger S, Neuberger A, Nadezhdin KD, Singh AK, Cunha MR, Derler I, Gyimesi G, Reymond JL, Hediger MA, Romanin C, Sobolevsky AI. Inactivation-mimicking block of the epithelial calcium channel TRPV6. Science Advances. 6. PMID 33246965 DOI: 10.1126/sciadv.abe1508  0.458
2020 Gangwar SP, Green MN, Michard E, Simon AA, Feijó JA, Sobolevsky AI. Structure of the Arabidopsis Glutamate Receptor-like Channel GLR3.2 Ligand-Binding Domain. Structure (London, England : 1993). PMID 33027636 DOI: 10.1016/j.str.2020.09.006  0.535
2020 Yelshanskaya MV, Singh AK, Narangoda C, Williams RSB, Kurnikova MG, Sobolevsky AI. Structural basis of AMPA receptor inhibition by 4-BCCA. British Journal of Pharmacology. PMID 32959886 DOI: 10.1111/Bph.15254  0.657
2020 Perszyk RE, Myers SJ, Yuan H, Gibb AJ, Furukawa H, Sobolevsky AI, Traynelis SF. Hodgkin-huxley-katz prize lecture: genetic and pharmacological control of glutamate receptor channel through a highly conserved gating motif. The Journal of Physiology. PMID 32468591 DOI: 10.1113/Jp278086  0.791
2020 Yelshanskaya MV, Nadezhdin KD, Kurnikova MG, Sobolevsky AI. Structure and function of the calcium-selective TRP channel TRPV6. The Journal of Physiology. PMID 32073143 DOI: 10.1113/Jp279024  0.703
2020 Singh AK, McGoldrick LL, Demirkhanyan L, Leslie M, Zakharian E, Sobolevsky AI. Author Correction: Structural basis of temperature sensation by the TRP channel TRPV3. Nature Structural & Molecular Biology. PMID 31932763 DOI: 10.1038/s41594-020-0376-x  0.3
2020 Singh AK, McGoldrick LL, Demirkhanyan L, Leslie M, Zakharian E, Sobolevsky AI. Structural Basis of Temperature Sensation by the TRP Channel TRPV3 Biophysical Journal. 118: 22a. DOI: 10.1016/j.bpj.2019.11.302  0.356
2020 McGoldrick LL, Singh AK, Demirkhanyan L, Gao DX, Lin T, Zakharian E, Sobolevsky AI. Structure-Function Relationship of the Thermo-Sensitive TRP Channel TRP1 from the Alga Chlamydomonas Reinhardtii Biophysical Journal. 118: 412a. DOI: 10.1016/j.bpj.2019.11.2329  0.369
2019 Singh AK, McGoldrick LL, Demirkhanyan L, Leslie M, Zakharian E, Sobolevsky AI. Structural basis of temperature sensation by the TRP channel TRPV3. Nature Structural & Molecular Biology. PMID 31636415 DOI: 10.1038/s41594-019-0318-7  0.332
2019 Twomey EC, Yelshanskaya MV, Sobolevsky AI. Structural and functional insights into transmembrane AMPA receptor regulatory protein complexes. The Journal of General Physiology. PMID 31615831 DOI: 10.1085/Jgp.201812264  0.792
2019 McGoldrick LL, Singh AK, Demirkhanyan L, Lin TY, Casner RG, Zakharian E, Sobolevsky AI. Structure of the thermo-sensitive TRP channel TRP1 from the alga Chlamydomonas reinhardtii. Nature Communications. 10: 4180. PMID 31519888 DOI: 10.1038/s41467-019-12121-9  0.464
2019 Macikova L, Vyklicka L, Barvik I, Sobolevsky AI, Vlachova V. Cytoplasmic Inter-Subunit Interface Controls Use-Dependence of Thermal Activation of TRPV3 Channel. International Journal of Molecular Sciences. 20. PMID 31426314 DOI: 10.3390/ijms20163990  0.396
2019 Singh AK, McGoldrick LL, Sobolevsky AI. Expression, Purification, and Crystallization of the Transient Receptor Potential Channel TRPV6. Methods in Molecular Biology (Clifton, N.J.). 1987: 23-37. PMID 31028671 DOI: 10.1007/978-1-4939-9446-5_2  0.458
2019 Twomey EC, Yelshanskaya MV, Sobolevsky AI, Vassilevski AA. Mechanism of glutamate receptor block by acylpolyamines Toxicon. 159: S7. DOI: 10.1016/J.Toxicon.2018.11.337  0.762
2018 Singh AK, McGoldrick LL, Sobolevsky AI. Structure and gating mechanism of the transient receptor potential channel TRPV3. Nature Structural & Molecular Biology. PMID 30127359 DOI: 10.1038/s41594-018-0108-7  0.468
2018 Twomey EC, Yelshanskaya MV, Vassilevski AA, Sobolevsky AI. Mechanisms of Channel Block in Calcium-Permeable AMPA Receptors. Neuron. PMID 30122377 DOI: 10.1016/J.Neuron.2018.07.027  0.795
2018 Singh AK, McGoldrick LL, Twomey EC, Sobolevsky AI. Mechanism of calmodulin inactivation of the calcium-selective TRP channel TRPV6. Science Advances. 4: eaau6088. PMID 30116787 DOI: 10.1126/Sciadv.Aau6088  0.762
2018 Singh AK, Saotome K, McGoldrick LL, Sobolevsky AI. Structural bases of TRP channel TRPV6 allosteric modulation by 2-APB. Nature Communications. 9: 2465. PMID 29941865 DOI: 10.1038/s41467-018-04828-y  0.495
2018 Sakipov S, Sobolevsky AI, Kurnikova MG. Ion Permeation Mechanism in Epithelial Calcium Channel TRVP6. Scientific Reports. 8: 5715. PMID 29632318 DOI: 10.1038/S41598-018-23972-5  0.677
2018 Singh AK, McGoldrick LL, Saotome K, Sobolevsky AI. X-ray Crystallography of TRP Channels. Channels (Austin, Tex.). 1-35. PMID 29589513 DOI: 10.1080/19336950.2018.1457898  0.453
2018 Sobolevsky A. Structure and Function of the Epithelial Calcium Channel TRPV6 Biophysical Journal. 114: 10a. DOI: 10.1016/J.Bpj.2017.11.096  0.482
2017 Osmakov DI, Koshelev SG, Andreev YA, Dubinnyi MA, Kublitski VS, Efremov RG, Sobolevsky AI, Kozlov SA. Proton-independent activation of acid-sensing ion channel ASIC3 by alkaloid lindoldhamine from Laurus nobilis. British Journal of Pharmacology. PMID 29277899 DOI: 10.1111/bph.14134  0.362
2017 McGoldrick LL, Singh AK, Saotome K, Yelshanskaya MV, Twomey EC, Grassucci RA, Sobolevsky AI. Opening of the human epithelial calcium channel TRPV6. Nature. PMID 29258289 DOI: 10.1038/Nature25182  0.78
2017 Twomey EC, Sobolevsky A. Structural mechanisms of gating in ionotropic glutamate receptors. Biochemistry. PMID 29037031 DOI: 10.1021/Acs.Biochem.7B00891  0.813
2017 Singh AK, Saotome K, Sobolevsky AI. Swapping of transmembrane domains in the epithelial calcium channel TRPV6. Scientific Reports. 7: 10669. PMID 28878326 DOI: 10.1038/s41598-017-10993-9  0.371
2017 Twomey EC, Yelshanskaya MV, Grassucci RA, Frank J, Sobolevsky AI. Channel opening and gating mechanism in AMPA-subtype glutamate receptors. Nature. PMID 28737760 DOI: 10.1038/Nature23479  0.825
2017 Twomey EC, Yelshanskaya MV, Grassucci RA, Frank J, Sobolevsky AI. Structural Bases of Desensitization in AMPA Receptor-Auxiliary Subunit Complexes. Neuron. 94: 569-580.e5. PMID 28472657 DOI: 10.1016/J.Neuron.2017.04.025  0.797
2017 Yelshanskaya MV, Mesbahi-Vasey S, Kurnikova MG, Sobolevsky AI. Role of the Ion Channel Extracellular Collar in AMPA Receptor Gating. Scientific Reports. 7: 1050. PMID 28432359 DOI: 10.1038/S41598-017-01146-Z  0.777
2017 Sakipov S, Sobolevsky AI, Kurnikova M. Ion Permeation Mechanism in TRPV6 Ca 2+ Channel Biophysical Journal. 112: 466a. DOI: 10.1016/J.Bpj.2016.11.2498  0.698
2016 Yelshanskaya MV, Singh AK, Sampson JM, Narangoda C, Kurnikova M, Sobolevsky AI. Structural Bases of Noncompetitive Inhibition of AMPA-Subtype Ionotropic Glutamate Receptors by Antiepileptic Drugs. Neuron. PMID 27618672 DOI: 10.1016/J.Neuron.2016.08.012  0.753
2016 Twomey EC, Yelshanskaya MV, Grassucci RA, Frank J, Sobolevsky AI. Elucidation of AMPA receptor-stargazin complexes by cryo-electron microscopy. Science (New York, N.Y.). 353: 83-6. PMID 27365450 DOI: 10.1126/Science.Aaf8411  0.774
2016 Saotome K, Singh AK, Yelshanskaya MV, Sobolevsky AI. Crystal structure of the epithelial calcium channel TRPV6. Nature. PMID 27296226 DOI: 10.1038/nature17975  0.42
2016 Yelshanskaya MV, Saotome K, Singh AK, Sobolevsky AI. Probing Intersubunit Interfaces in AMPA-subtype Ionotropic Glutamate Receptors. Scientific Reports. 6: 19082. PMID 26739260 DOI: 10.1038/srep19082  0.435
2016 Yelshanskaya MV, Saotome K, Li M, Sobolevsky AI. Expression, purification, and crystallization of full lengthionotropic glutamate receptors Neuromethods. 106: 83-100. DOI: 10.1007/978-1-4939-2812-5_7  0.323
2015 Sobolevsky AI. Structure and gating of tetrameric glutamate receptors. The Journal of Physiology. 593: 29-38. PMID 25556785 DOI: 10.1113/jphysiol.2013.264911  0.56
2014 Yelshanskaya MV, Li M, Sobolevsky AI. Structure of an agonist-bound ionotropic glutamate receptor. Science (New York, N.Y.). 345: 1070-4. PMID 25103407 DOI: 10.1126/science.1256508  0.571
2009 Sobolevsky AI, Rosconi MP, Gouaux E. X-ray structure, symmetry and mechanism of an AMPA-subtype glutamate receptor. Nature. 462: 745-56. PMID 19946266 DOI: 10.1038/nature08624  0.6
2009 Jin R, Singh SK, Gu S, Furukawa H, Sobolevsky AI, Zhou J, Jin Y, Gouaux E. Crystal structure and association behaviour of the GluR2 amino-terminal domain. The Embo Journal. 28: 1812-23. PMID 19461580 DOI: 10.1038/Emboj.2009.140  0.712
2007 Sobolevsky AI, Prodromou ML, Yelshansky MV, Wollmuth LP. Subunit-specific contribution of pore-forming domains to NMDA receptor channel structure and gating. The Journal of General Physiology. 129: 509-25. PMID 17504910 DOI: 10.1085/jgp.200609718  0.419
2007 Sobolevsky AI. Insights into structure and function of ionotropic glutamate receptor channels: Starting from channel block Biochemistry (Moscow) Supplement Series a: Membrane and Cell Biology. 1: 45-56. DOI: 10.1134/S1990747807010059  0.559
2005 Sobolevsky AI, Yelshansky MV, Wollmuth LP. State-dependent changes in the electrostatic potential in the pore of a GluR channel. Biophysical Journal. 88: 235-42. PMID 15516523 DOI: 10.1529/biophysj.104.049411  0.436
2004 Wollmuth LP, Sobolevsky AI. Structure and gating of the glutamate receptor ion channel. Trends in Neurosciences. 27: 321-8. PMID 15165736 DOI: 10.1016/j.tins.2004.04.005  0.597
2004 Yelshansky MV, Sobolevsky AI, Jatzke C, Wollmuth LP. Block of AMPA receptor desensitization by a point mutation outside the ligand-binding domain. The Journal of Neuroscience : the Official Journal of the Society For Neuroscience. 24: 4728-36. PMID 15152033 DOI: 10.1523/JNEUROSCI.0757-04.2004  0.51
2004 Sobolevsky AI, Yelshansky MV, Wollmuth LP. The outer pore of the glutamate receptor channel has 2-fold rotational symmetry. Neuron. 41: 367-78. PMID 14766176 DOI: 10.1016/S0896-6273(04)00008-X  0.53
2003 Sobolevsky AI, Yelshansky MV, Wollmuth LP. Different gating mechanisms in glutamate receptor and K+ channels. The Journal of Neuroscience : the Official Journal of the Society For Neuroscience. 23: 7559-68. PMID 12930794  0.487
2002 Sobolevsky AI, Rooney L, Wollmuth LP. Staggering of subunits in NMDAR channels. Biophysical Journal. 83: 3304-14. PMID 12496098 DOI: 10.1016/S0006-3495(02)75331-9  0.467
2002 Sobolevsky AI, Beck C, Wollmuth LP. Molecular rearrangements of the extracellular vestibule in NMDAR channels during gating. Neuron. 33: 75-85. PMID 11779481 DOI: 10.1016/S0896-6273(01)00560-8  0.462
2000 Sobolevsky AI. Quantitative analysis of tetrapentylammonium-induced blockade of open N-methyl-D-aspartate channels. Biophysical Journal. 79: 1324-35. PMID 10968995 DOI: 10.1016/S0006-3495(00)76385-5  0.403
2000 Sobolevsky AI, Yelshansky MV. The trapping block of NMDA receptor channels in acutely isolated rat hippocampal neurones. The Journal of Physiology. 493-506. PMID 10922002 DOI: 10.1111/J.1469-7793.2000.T01-2-00493.X  0.417
2000 Yelshansky MV, Sobolevsky AI, Khodorov BI. Effect of arachidonic acid on the NMDA channel blockade by tetrapentylammonium and eosin Neurophysiology. 32: 189-189. DOI: 10.1007/BF02506565  0.387
1999 Sobolevsky AI, Khodorov BI. Blockade of NMDA channels in acutely isolated rat hippocampal neurons by the Na+/Ca2+ exchange inhibitor KB-R7943. Neuropharmacology. 38: 1235-42. PMID 10462135 DOI: 10.1016/S0028-3908(99)00040-4  0.397
1999 Sobolevsky AI. Two-component blocking kinetics of open NMDA channels by organic cations. Biochimica Et Biophysica Acta. 1416: 69-91. PMID 9889324 DOI: 10.1016/S0005-2736(98)00211-9  0.468
1999 Sobolevsky AI, Koshelev SG, Khodorov BI. Probing of NMDA Channels with Fast Blockers The Journal of Neuroscience. 19: 10611-10626. DOI: 10.1523/JNEUROSCI.19-24-10611.1999  0.423
1998 Sobolevsky AI, Koshelev SG, Khodorov BI. Interaction of memantine and amantadine with agonist-unbound NMDA-receptor channels in acutely isolated rat hippocampal neurons. The Journal of Physiology. 47-60. PMID 9729616 DOI: 10.1111/J.1469-7793.1998.047BF.X  0.479
1998 Sobolevsky A, Koshelev S. Two blocking sites of amino-adamantane derivatives in open N-methyl-D-aspartate channels. Biophysical Journal. 74: 1305-19. PMID 9512028 DOI: 10.1016/S0006-3495(98)77844-0  0.492
1997 Sobolevsky A, Koshelev S, Khodorov BI. Bepridil-induced blockade of NMDA channels in rat hippocampal neurones. Neuropharmacology. 36: 319-24. PMID 9175610 DOI: 10.1016/S0028-3908(97)00003-8  0.453
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