51
|
Kopysov V, Makarov A, Boyarkin OV. Identification of Isomeric Ephedrines by Cold Ion UV Spectroscopy: Toward Practical Implementation. Anal Chem 2016; 89:544-547. [PMID: 27992166 DOI: 10.1021/acs.analchem.6b04182] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Ephedrine and pseudoephedrine are stimulant drugs whose use is prohibited in athletic competition by the World Anti-Doping Agency (WADA) at very different threshold doping violation concentrations. We use a recently developed universal approach that integrates UV photofragmentation spectroscopy of cold ions with Orbitrap mass spectrometry (MS) for highly selective and highly sensitive identification of these diastereomers. Both species can be selectively detected at a solution concentration of a few tens of ng/mL, which is almost 3 orders of magnitude lower than the threshold concentration required by WADA. Relative concentrations of the isomers in solutions have been determined with the standard deviation of 3.1%, when the ions were cooled in an ion trap maintained at T = 6 K. Considering practical implementation of the method, we evaluated its performance for a simplified instrumentation. At an affordable elevated temperature of ∼70 K and with a low-maintenance midbandwidth optical parametric oscillator, a few second measurement should yield nearly the same selectivity and only ten times lower sensitivity than with the current research grade instrument.
Collapse
|
52
|
Kasatov D, Koshkarev A, Kuznetsov A, Makarov A, Ostreinov Y, Shchudlo I, Sorokin I, Sycheva T, Taskaev S, Zaidi L. The accelerator neutron source for boron neutron capture therapy. ACTA ACUST UNITED AC 2016. [DOI: 10.1088/1742-6596/769/1/012064] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
53
|
Holden DD, Makarov A, Schwartz JC, Sanders JD, Zhuk E, Brodbelt JS. Ultraviolet Photodissociation Induced by Light‐Emitting Diodes in a Planar Ion Trap. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201605850] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
54
|
Holden DD, Makarov A, Schwartz JC, Sanders JD, Zhuk E, Brodbelt JS. Ultraviolet Photodissociation Induced by Light-Emitting Diodes in a Planar Ion Trap. Angew Chem Int Ed Engl 2016; 55:12417-21. [PMID: 27605434 DOI: 10.1002/anie.201605850] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Revised: 08/02/2016] [Indexed: 11/09/2022]
Abstract
The first application of light-emitting diodes (LEDs) for ultraviolet photodissociation (UVPD) mass spectrometry is reported. LEDs provide a compact, low cost light source and have been incorporated directly into the trapping cell of an Orbitrap mass spectrometer. MS/MS efficiencies of over 50 % were obtained using an extended irradiation period, and UVPD was optimized by modulating the ion trapping parameters to maximize the overlap between the ion cloud and the irradiation volume.
Collapse
|
55
|
Bagirov M, Makarov A, Getman V, Vereshchako R, Sokolov V, Seykovskyi O, Loukasevych M. F-133PARENCHYMA SPARING NON-STANDARD BRONCHIAL RECONSTRUCTIONS: RETROSPECTIVE ANALYSIS OF 774 PATIENTS WITH BRONCHOPLASTIC PROCEDURES. Interact Cardiovasc Thorac Surg 2016. [DOI: 10.1093/icvts/ivw260.131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
56
|
Chatterjee B, Makarov A, Clemmer DE, Steen H, Steen J, Saffell-Clemmer W, Moghekar AR, Mohan Rao C, Bradshaw RA, Thakur SS. Proteomics in India: A Report on a Brainstorming Meeting at Hyderabad, India. Mol Cell Proteomics 2016; 15:2229-35. [PMID: 27114450 DOI: 10.1074/mcp.o115.055020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Indexed: 11/06/2022] Open
Abstract
The Centre for Cellular and Molecular Biology, Hyderabad, India, was host for an international forum, or "brainstorming meeting," on proteomics held in November 2014, which provided the opportunity to showcase proteomic science in India and to allow discussions between Indian scientists and students and several international visitors. This provided an amalgamation of speakers and participants whose interests lay mainly in developing and using mass-spectrometry-based proteomics to advance their research work. A week-long workshop with hands-on training in proteomic methodology followed the meeting.
Collapse
|
57
|
Kersten H, Kroll K, Haberer K, Brockmann KJ, Benter T, Peterson A, Makarov A. Design Study of an Atmospheric Pressure Photoionization Interface for GC-MS. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2016; 27:607-614. [PMID: 26729450 DOI: 10.1007/s13361-015-1320-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Revised: 11/26/2015] [Accepted: 11/29/2015] [Indexed: 06/05/2023]
Abstract
This contribution reports on the development of an atmospheric pressure photoionization (APPI) source interfacing a gas chromatograph (GC) with a bench-top Orbitrap high resolution mass spectrometer (MS). We present efforts on method development aiming at high temperature stability (325°C), constant low impurity levels upon prolonged source operation, and efficient reaction volume irradiation combined with minimum peak broadening. The performance throughout each iterative development step was carefully assessed. The final GC-APPI-MS setup demonstrated femtogram-on-column sensitivity and chromatographic peaks of Gaussian shape with base peak widths <2 s for even the highest boiling compounds present in different EPA standard mixtures. Graphical Abstract ᅟ.
Collapse
|
58
|
Gault J, Donlan JAC, Liko I, Hopper JTS, Gupta K, Housden NG, Struwe WB, Marty MT, Mize T, Bechara C, Zhu Y, Wu B, Kleanthous C, Belov M, Damoc E, Makarov A, Robinson CV. High-resolution mass spectrometry of small molecules bound to membrane proteins. Nat Methods 2016; 13:333-6. [PMID: 26901650 PMCID: PMC4856209 DOI: 10.1038/nmeth.3771] [Citation(s) in RCA: 178] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Accepted: 01/13/2016] [Indexed: 12/24/2022]
Abstract
Small molecules are known to stabilize membrane proteins and to modulate their function and oligomeric state, but such interactions are often hard to precisely define. Here we develop and apply a high-resolution, Orbitrap mass spectrometry-based method for analyzing intact membrane protein-ligand complexes. Using this platform, we resolve the complexity of multiple binding events, quantify small molecule binding and reveal selectivity for endogenous lipids that differ only in acyl chain length.
Collapse
|
59
|
Kopysov V, Makarov A, Boyarkin OV. Nonstatistical UV Fragmentation of Gas-Phase Peptides Reveals Conformers and Their Structural Features. J Phys Chem Lett 2016; 7:1067-1071. [PMID: 26950179 DOI: 10.1021/acs.jpclett.6b00292] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Solving the 3D structure of a biomolecule requires recognition of its conformers and measurements of their individual structural identities, which can be compared with calculations. We employ the phenomenon of nonstatistical photofragmentation, detected by a combination of UV cold ion spectroscopy and high-resolution mass spectrometry, to identify the main conformers of gas-phase peptides and to recover individual UV absorption and mass spectra of all of these conformers in a single laser scan. We first validate this approach with a benchmark dipeptide, Tyr-Ala, and then apply it to a decapeptide, gramicidin S. The revealed characteristic structural difference between the conformers of the latter identifies some of the previously calculated structures of gramicidin S as the most likely geometries of its remaining unsolved conformer.
Collapse
|
60
|
Kasatov D, Makarov A, Shchudlo I, Taskaev S. A study of gamma-ray and neutron radiation in the interaction of a 2 MeV proton beam with various materials. Appl Radiat Isot 2015; 106:38-40. [PMID: 26298434 DOI: 10.1016/j.apradiso.2015.08.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2014] [Revised: 07/29/2015] [Accepted: 08/11/2015] [Indexed: 11/28/2022]
Abstract
Epithermal neutron source based on a tandem accelerator with vacuum insulation and lithium target has been proposed, developed and operated in Budker Institute of Nuclear Physics. The source is regarded as a prototype of a future compact device suitable for carrying out BNCT in oncology centers. In this work the measurements of gamma-ray and neutron radiation are presented for the interaction of a 2 MeV proton beam with various materials (Li, C, F, Al, V, Ti, Cu, Mo, stainless steel, and Ta). The obtained results enabled the optimization of the neutron-generating target and the high energy beam transportation path.
Collapse
|
61
|
Makarov A, Ostreinov Y, Taskaev S, Vobly P. Modification of the argon stripping target of the tandem accelerator. Appl Radiat Isot 2015; 106:53-6. [PMID: 26242555 DOI: 10.1016/j.apradiso.2015.07.046] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Revised: 06/19/2015] [Accepted: 07/25/2015] [Indexed: 11/28/2022]
Abstract
The tandem accelerator with vacuum insulation has been proposed and developed in Budker Institute of Nuclear Physics. Negative hydrogen ions are accelerated by the positive 1MV potential of the high-voltage electrode, converted into protons in the gas stripping target inside the electrode, and then protons are accelerated again by the same potential. A stationary proton beam with 2 MeV energy, 1.6 mA current, 0.1% energy monochromaticity, and 0.5% current stability is obtained now. To conduct Boron Neutron Capture Therapy it is planned to increase the proton beam current to at least 3 mA. The paper presents the results of experimental studies clarifying the reasons for limiting the current, and gives suggestions for modifying the gas stripping target in order to increase the proton beam current along with the stability of the accelerator.
Collapse
|
62
|
Dyachenko A, Wang G, Belov M, Makarov A, de Jong RN, van den Bremer ETJ, Parren PWHI, Heck AJR. Tandem Native Mass-Spectrometry on Antibody–Drug Conjugates and Submillion Da Antibody–Antigen Protein Assemblies on an Orbitrap EMR Equipped with a High-Mass Quadrupole Mass Selector. Anal Chem 2015; 87:6095-102. [DOI: 10.1021/acs.analchem.5b00788] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
63
|
Kopysov V, Makarov A, Boyarkin OV. Colors for Molecular Masses: Fusion of Spectroscopy and Mass Spectrometry for Identification of Biomolecules. Anal Chem 2015; 87:4607-11. [DOI: 10.1021/acs.analchem.5b00822] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
64
|
Brunner AM, Lössl P, Liu F, Huguet R, Mullen C, Yamashita M, Zabrouskov V, Makarov A, Altelaar AFM, Heck AJR. Benchmarking Multiple Fragmentation Methods on an Orbitrap Fusion for Top-down Phospho-Proteoform Characterization. Anal Chem 2015; 87:4152-8. [DOI: 10.1021/acs.analchem.5b00162] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
|
65
|
Makarov A, Sverdlov V, Selberherr S. Progress in Magnetoresistive Memory: Magnetic Tunnel Junctions with a Composite Free Layer. FRONTIERS IN ELECTRONICS 2015. [DOI: 10.1142/9789814656917_0001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
|
66
|
Eliuk S, Makarov A. Evolution of Orbitrap Mass Spectrometry Instrumentation. ANNUAL REVIEW OF ANALYTICAL CHEMISTRY (PALO ALTO, CALIF.) 2015; 8:61-80. [PMID: 26161972 DOI: 10.1146/annurev-anchem-071114-040325] [Citation(s) in RCA: 259] [Impact Index Per Article: 28.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
We discuss the evolution of Orbitrap mass spectrometry (MS) from its birth in the late 1990s to its current role as one of the most prominent techniques for MS. The Orbitrap mass analyzer is the first high-performance mass analyzer that employs trapping of ions in electrostatic fields. Tight integration with the ion injection process enables the high-resolution, mass accuracy, and sensitivity that have become essential for addressing analytical needs in numerous areas of research, as well as in routine analysis. We examine three major families of instruments (related to the LTQ Orbitrap, Q Exactive, and Orbitrap Fusion mass spectrometers) in the context of their historical development over the past ten eventful years. We discuss as well future trends and perspectives of Orbitrap MS. We illustrate the compelling potential of Orbitrap-based mass spectrometers as (ultra) high-resolution platforms, not only for high-end proteomic applications, but also for routine targeted analysis.
Collapse
|
67
|
Scheltema RA, Hauschild JP, Lange O, Hornburg D, Denisov E, Damoc E, Kuehn A, Makarov A, Mann M. The Q Exactive HF, a Benchtop mass spectrometer with a pre-filter, high-performance quadrupole and an ultra-high-field Orbitrap analyzer. Mol Cell Proteomics 2014; 13:3698-708. [PMID: 25360005 PMCID: PMC4256516 DOI: 10.1074/mcp.m114.043489] [Citation(s) in RCA: 245] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
The quadrupole Orbitrap mass spectrometer (Q Exactive) made a powerful proteomics instrument available in a benchtop format. It significantly boosted the number of proteins analyzable per hour and has now evolved into a proteomics analysis workhorse for many laboratories. Here we describe the Q Exactive Plus and Q Exactive HF mass spectrometers, which feature several innovations in comparison to the original Q Exactive instrument. A low-resolution pre-filter has been implemented within the injection flatapole, preventing unwanted ions from entering deep into the system, and thereby increasing its robustness. A new segmented quadrupole, with higher fidelity of isolation efficiency over a wide range of isolation windows, provides an almost 2-fold improvement of transmission at narrow isolation widths. Additionally, the Q Exactive HF has a compact Orbitrap analyzer, leading to higher field strength and almost doubling the resolution at the same transient times. With its very fast isolation and fragmentation capabilities, the instrument achieves overall cycle times of 1 s for a top 15 to 20 higher energy collisional dissociation method. We demonstrate the identification of 5000 proteins in standard 90-min gradients of tryptic digests of mammalian cell lysate, an increase of over 40% for detected peptides and over 20% for detected proteins. Additionally, we tested the instrument on peptide phosphorylation enriched samples, for which an improvement of up to 60% class I sites was observed.
Collapse
|
68
|
Kozin SA, Tsvetkov P, Kulikova A, Indeikina M, Mezentsev Y, Istrate A, Popov I, Ivanov A, Polshakov V, Makarov A. P4‐028: ZINC‐INDUCED DIMERS OF CHEMICALLY MODIFIED A β‐ ARE POSSIBLE AGGREGATION SEEDS. Alzheimers Dement 2014. [DOI: 10.1016/j.jalz.2014.05.1542] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
69
|
Snijder J, van de
Waterbeemd M, Damoc E, Denisov E, Grinfeld D, Bennett A, Agbandje-McKenna M, Makarov A, Heck AJR. Defining the stoichiometry and cargo load of viral and bacterial nanoparticles by Orbitrap mass spectrometry. J Am Chem Soc 2014; 136:7295-9. [PMID: 24787140 PMCID: PMC4046769 DOI: 10.1021/ja502616y] [Citation(s) in RCA: 123] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2013] [Revised: 03/14/2014] [Indexed: 12/12/2022]
Abstract
Accurate mass analysis can provide useful information on the stoichiometry and composition of protein-based particles, such as virus-like assemblies. For applications in nanotechnology and medicine, such nanoparticles are loaded with foreign cargos, making accurate mass information essential to define the cargo load. Here, we describe modifications to an Orbitrap mass spectrometer that enable high mass analysis of several virus-like nanoparticles up to 4.5 MDa in mass. This allows the accurate determination of the composition of virus-like particles. The modified instrument is utilized to determine the cargo load of bacterial encapsulin nanoparticles that were engineered to encapsulate foreign cargo proteins. We find that encapsulin packages from 8 up to 12 cargo proteins, thereby quantifying cargo load but also showing the ensemble spread. In addition, we determined the previously unknown stoichiometry of the three different splice variants of the capsid protein in adeno-associated virus (AAV) capsids, showing that symmetry is broken and assembly is heterogeneous and stochastic. These results demonstrate the potential of high-resolution mass analysis of protein-based nanoparticles, with widespread applications in chemical biology and nanotechnology.
Collapse
|
70
|
Grechnikov A, Nikiforov S, Strupat K, Makarov A. Determination of rhenium and osmium complexes by surface-assisted laser desorption/ionization coupled to Orbitrap mass analyzer. Anal Bioanal Chem 2014; 406:3019-23. [DOI: 10.1007/s00216-014-7767-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2013] [Revised: 03/07/2014] [Accepted: 03/14/2014] [Indexed: 10/25/2022]
|
71
|
Grinfeld D, Giannakopulos AE, Kopaev I, Makarov A, Monastyrskiy M, Skoblin M. Space-charge effects in an electrostatic multireflection ion trap. EUROPEAN JOURNAL OF MASS SPECTROMETRY (CHICHESTER, ENGLAND) 2014; 20:131-142. [PMID: 24895773 DOI: 10.1255/ejms.1265] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The multireflection ion traps with isochronous properties offer a Lot of opportunities for time-of-flight mass spectrometry by elongation of the ion path, thus preserving the compact dimensions of an instrument. We have built and tested a two-mirror linear trap that provides at least 80,000 mass-resolving power. Although the mass resolution appears promising, there are substantial limitations that arise from Coulomb interactions of the trapped ions. Among these, the mutual repulsion of ions with same or close mass-to-charge ratios appears dominant, resulting in counterintuitive motion synchronization. The self-bunching and coalescence effects are also examined by numerical simulation.
Collapse
|
72
|
Chingin K, Makarov A, Denisov E, Rebrov O, Zubarev RA. Fragmentation of positively-charged biological ions activated with a beam of high-energy cations. Anal Chem 2013; 86:372-9. [PMID: 24236851 DOI: 10.1021/ac403193k] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
First results are reported on the fragmentation of multiply protonated polypeptide ions produced in electrospray ionization mass spectrometry (ESI-MS) with a beam of high-energy cations as a source of activation. The ion beam is generated with a microwave plasma gun installed on a benchtop Q Exactive mass spectrometer. Precursor polypeptide ions are activated when trapped inside the collision cell of the instrument (HCD cell), and product species are detected in the Orbitrap analyzer. Upon exposure to the beam of air plasma cations (∼100 μA, 5 s), model precursor species such as multiply protonated angiotensin I and ubiquitin dissociated across a variety of pathways. Those pathways include the cleavages of C-CO, C-N as well as N-Cα backbone bonds, accordingly manifested as b/y, a, and c/z fragment ion series in tandem mass spectra. The fragmentation pattern observed includes characteristic fragments of collision-induced dissociation (CID) (b/y/a fragments) as well as electron capture/transfer dissociation (ECD, ETD) (c/z fragments), suggesting substantial contribution of both vibrational and electronic excitation in our experiments. Besides backbone cleavages, notable amounts of nondissociated precursor species were observed with reduced net charge, formed via electron or proton transfer between the colliding partners. Peaks corresponding to increased charge states of the precursor ions were also detected, which is the major distinctive feature of ion beam activation.
Collapse
|
73
|
Aleynik V, Bashkirtsev A, Kanygin V, Kasatov D, Kuznetsov A, Makarov A, Schudlo I, Sorokin I, Taskaev S, Tiunov M. Current progress and future prospects of the VITA based neutron source. Appl Radiat Isot 2013; 88:177-9. [PMID: 24369890 DOI: 10.1016/j.apradiso.2013.11.132] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2012] [Revised: 10/31/2013] [Accepted: 11/21/2013] [Indexed: 11/30/2022]
Abstract
At the BINP, a pilot accelerator based epithermal neutron source is now in use. Most recent investigations on the facility are related with studying the dark current, X-ray radiation measuring, optimization of H(-)-beam injection and new gas stripping target calibrating. The results of these studies, ways of providing stability to the accelerator are presented and discussed, as well as the ways of creating the therapeutic beam and strategies of applying the facility for clinical use.
Collapse
|
74
|
Senko MW, Remes PM, Canterbury JD, Mathur R, Song Q, Eliuk SM, Mullen C, Earley L, Hardman M, Blethrow JD, Bui H, Specht A, Lange O, Denisov E, Makarov A, Horning S, Zabrouskov V. Novel Parallelized Quadrupole/Linear Ion Trap/Orbitrap Tribrid Mass Spectrometer Improving Proteome Coverage and Peptide Identification Rates. Anal Chem 2013; 85:11710-4. [DOI: 10.1021/ac403115c] [Citation(s) in RCA: 186] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
75
|
Kozin S, Cheglakov I, Ovsepyan A, Telegin G, Tsvetkov P, Lisitsa A, Makarov A. P4–342: Amyloidogenic properties of isoAsp7‐containing beta‐amyloid peptide. Alzheimers Dement 2013. [DOI: 10.1016/j.jalz.2013.08.176] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|