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Espenship MF, Laskin J. Writing with Mass-Selected Ions Using a Dynamic Field Wien Filter. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2024; 35:2472-2479. [PMID: 39255390 DOI: 10.1021/jasms.4c00274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/12/2024]
Abstract
We have designed and constructed a low-cost Wien filter based on strong permanent magnets and integrated it into an ion soft-landing instrument to enable parallel deposition as well as one- and two-dimensional surface patterning of mass-selected ions using dynamic fields. We show the capabilities of this device for separating ions from a multicomponent high-flux continuous ion beam and simultaneous deposition of ions of different mass-to-charge ratios onto discrete locations on a surface. When a dynamic electric field is applied parallel to the magnetic field, ions are deposited in one-dimensional arrays, laterally separated by mass. The field's strength, frequency, and waveform type determine both the lengths of the arrays and the density of ions across the 1-D pattern. Additionally, a second dynamic field from user-defined waveforms orthogonal to the magnetic field enables two-dimensional surface patterning of ions while maintaining mass separation. These experiments demonstrate the practical utility of a Wien filter for the controlled fabrication of interfaces with arbitrary patterns of mass-selected ions.
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Affiliation(s)
- Michael F Espenship
- James Tarpo Jr. and Margaret Tarpo Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Julia Laskin
- James Tarpo Jr. and Margaret Tarpo Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
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2
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Walz A, Stoiber K, Huettig A, Schlichting H, Barth JV. Navigate Flying Molecular Elephants Safely to the Ground: Mass-Selective Soft Landing up to the Mega-Dalton Range by Electrospray Controlled Ion-Beam Deposition. Anal Chem 2022; 94:7767-7778. [PMID: 35609119 PMCID: PMC9178560 DOI: 10.1021/acs.analchem.1c04495] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The prototype of a highly versatile and efficient preparative mass spectrometry system used for the deposition of molecules in ultrahigh vacuum (UHV) is presented, along with encouraging performance data obtained using four model species that are thermolabile or not sublimable. The test panel comprises two small organic compounds, a small and very large protein, and a large DNA species covering a 4-log mass range up to 1.7 MDa as part of a broad spectrum of analyte species evaluated to date. Three designs of innovative ion guides, a novel digital mass-selective quadrupole (dQMF), and a standard electrospray ionization (ESI) source are combined to an integrated device, abbreviated electrospray controlled ion-beam deposition (ES-CIBD). Full control is achieved by (i) the square-wave-driven radiofrequency (RF) ion guides with steadily tunable frequencies, including a dQMF allowing for investigation, purification, and deposition of a virtually unlimited m/z range, (ii) the adjustable landing energy of ions down to ∼2 eV/z enabling integrity-preserving soft landing, (iii) the deposition in UHV with high ion beam intensity (up to 3 nA) limiting contaminations and deposition time, and (iv) direct coverage control via the deposited charge. The maximum resolution of R = 650 and overall efficiency up to Ttotal = 4.4% calculated from the solution to UHV deposition are advantageous, whereby the latter can be further enhanced by optimizing ionization performance. In the setup presented, a scanning tunneling microscope (STM) is attached for in situ UHV investigations of deposited species, demonstrating a selective, structure-preserving process and atomically clean layers.
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Affiliation(s)
- Andreas Walz
- Physics Department E20, Technical University of Munich, 85748 Garching, Germany
| | - Karolina Stoiber
- Physics Department E20, Technical University of Munich, 85748 Garching, Germany
| | - Annette Huettig
- Physics Department E20, Technical University of Munich, 85748 Garching, Germany
| | - Hartmut Schlichting
- Physics Department E20, Technical University of Munich, 85748 Garching, Germany
| | - Johannes V Barth
- Physics Department E20, Technical University of Munich, 85748 Garching, Germany
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3
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Ran W, Walz A, Stoiber K, Knecht P, Xu H, Papageorgiou AC, Huettig A, Cortizo‐Lacalle D, Mora‐Fuentes JP, Mateo‐Alonso A, Schlichting H, Reichert J, Barth JV. Depositing Molecular Graphene Nanoribbons on Ag(111) by Electrospray Controlled Ion Beam Deposition: Self-Assembly and On-Surface Transformations. Angew Chem Int Ed Engl 2022; 61:e202111816. [PMID: 35077609 PMCID: PMC9305426 DOI: 10.1002/anie.202111816] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Indexed: 12/31/2022]
Abstract
The chemical processing of low-dimensional carbon nanostructures is crucial for their integration in future devices. Here we apply a new methodology in atomically precise engineering by combining multistep solution synthesis of N-doped molecular graphene nanoribbons (GNRs) with mass-selected ultra-high vacuum electrospray controlled ion beam deposition on surfaces and real-space visualisation by scanning tunnelling microscopy. We demonstrate how this method yields solely a controllable amount of single, otherwise unsublimable, GNRs of 2.9 nm length on a planar Ag(111) surface. This methodology allows for further processing by employing on-surface synthesis protocols and exploiting the reactivity of the substrate. Following multiple chemical transformations, the GNRs provide reactive building blocks to form extended, metal-organic coordination polymers.
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Affiliation(s)
- Wei Ran
- Physics Department E20Technical University of MunichJames Franck Straße 185748GarchingGermany
| | - Andreas Walz
- Physics Department E20Technical University of MunichJames Franck Straße 185748GarchingGermany
| | - Karolina Stoiber
- Physics Department E20Technical University of MunichJames Franck Straße 185748GarchingGermany
| | - Peter Knecht
- Physics Department E20Technical University of MunichJames Franck Straße 185748GarchingGermany
| | - Hongxiang Xu
- Physics Department E20Technical University of MunichJames Franck Straße 185748GarchingGermany
| | | | - Annette Huettig
- Physics Department E20Technical University of MunichJames Franck Straße 185748GarchingGermany
| | - Diego Cortizo‐Lacalle
- POLYMATUniversity of the Basque Country UPV/EHUAvenida de Tolosa 7220018Donostia-San SebastianSpain
| | - Juan P. Mora‐Fuentes
- POLYMATUniversity of the Basque Country UPV/EHUAvenida de Tolosa 7220018Donostia-San SebastianSpain
| | - Aurelio Mateo‐Alonso
- POLYMATUniversity of the Basque Country UPV/EHUAvenida de Tolosa 7220018Donostia-San SebastianSpain
- Ikerbasque, Basque Foundation for ScienceBilbaoSpain
| | - Hartmut Schlichting
- Physics Department E20Technical University of MunichJames Franck Straße 185748GarchingGermany
| | - Joachim Reichert
- Physics Department E20Technical University of MunichJames Franck Straße 185748GarchingGermany
| | - Johannes V. Barth
- Physics Department E20Technical University of MunichJames Franck Straße 185748GarchingGermany
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Ran W, Walz A, Stoiber K, Knecht P, Xu H, Papageorgiou AC, Huettig A, Cortizo‐Lacalle D, Mora‐Fuentes JP, Mateo‐Alonso A, Schlichting H, Reichert J, Barth JV. Depositing Molecular Graphene Nanoribbons on Ag(111) by Electrospray Controlled Ion Beam Deposition: Self‐Assembly and On‐Surface Transformations. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202111816] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Wei Ran
- Physics Department E20 Technical University of Munich James Franck Straße 1 85748 Garching Germany
| | - Andreas Walz
- Physics Department E20 Technical University of Munich James Franck Straße 1 85748 Garching Germany
| | - Karolina Stoiber
- Physics Department E20 Technical University of Munich James Franck Straße 1 85748 Garching Germany
| | - Peter Knecht
- Physics Department E20 Technical University of Munich James Franck Straße 1 85748 Garching Germany
| | - Hongxiang Xu
- Physics Department E20 Technical University of Munich James Franck Straße 1 85748 Garching Germany
| | - Anthoula C. Papageorgiou
- Physics Department E20 Technical University of Munich James Franck Straße 1 85748 Garching Germany
| | - Annette Huettig
- Physics Department E20 Technical University of Munich James Franck Straße 1 85748 Garching Germany
| | - Diego Cortizo‐Lacalle
- POLYMAT University of the Basque Country UPV/EHU Avenida de Tolosa 72 20018 Donostia-San Sebastian Spain
| | - Juan P. Mora‐Fuentes
- POLYMAT University of the Basque Country UPV/EHU Avenida de Tolosa 72 20018 Donostia-San Sebastian Spain
| | - Aurelio Mateo‐Alonso
- POLYMAT University of the Basque Country UPV/EHU Avenida de Tolosa 72 20018 Donostia-San Sebastian Spain
- Ikerbasque, Basque Foundation for Science Bilbao Spain
| | - Hartmut Schlichting
- Physics Department E20 Technical University of Munich James Franck Straße 1 85748 Garching Germany
| | - Joachim Reichert
- Physics Department E20 Technical University of Munich James Franck Straße 1 85748 Garching Germany
| | - Johannes V. Barth
- Physics Department E20 Technical University of Munich James Franck Straße 1 85748 Garching Germany
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5
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Su P, Espenship MF, Laskin J. Principles of Operation of a Rotating Wall Mass Analyzer for Preparative Mass Spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2020; 31:1875-1884. [PMID: 32809825 DOI: 10.1021/jasms.0c00140] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In this contribution, we describe the principles of operation of a rotating wall mass analyzer (RWMA), a mass-dispersive device for preparative mass spectrometry. Ions of different m/z are spatially separated by RWMA and deposited onto ring-shaped areas of distinct radii on a surface. We use a combination of an analytical equation for predicting the radius of the deposition ring and SIMION simulations to understand how to optimize the experimental conditions for the separation of multicomponent mixtures. The results of these simulations are compared with the experimental data. We introduce a universal mass calibration procedure, based on a series of polyacrylamide ions, which is subsequently used to predict the deposition radii of unknown analytes. The calibration is independent of the polarity, kinetic energy, and charge state of the ion as demonstrated by assigning m/z values of different analytes including multiply charged ubiquitin ions. We demonstrate that mass resolution of the RWMA is affected by the width and kinetic energy distribution of the ion beam. The best mass resolution obtained in this study is m/Δm = ∼20. Preparative mass spectrometry using RWMA provides the advantages of simplicity, compactness, and low fabrication cost, which are particularly promising for the development of miniaturized instrumentation. The results presented in this work can be readily adapted to preparative separation of a variety of charged species of interest to the broad scientific community.
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Affiliation(s)
- Pei Su
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
| | - Michael F Espenship
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
| | - Julia Laskin
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
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Fies WA, Dugger JW, Dick JE, Wilder LM, Browning KL, Doucet M, Browning JF, Webb LJ. Direct Measurement of Water Permeation in Submerged Alkyl Thiol Self-Assembled Monolayers on Gold Surfaces Revealed by Neutron Reflectometry. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:5647-5662. [PMID: 30919634 DOI: 10.1021/acs.langmuir.9b00541] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Self-assembled monolayers (SAMs) of alkyl thiols are frequently used to chemically functionalize gold surfaces for applications throughout materials chemistry, electrochemistry, and biotechnology. Despite this, a detailed understanding of the structure of the SAM-water interface generated from both formation and use of the SAM in an aqueous environment is elusive, and analytical measurements of the structure and chemistry of the SAM-water interface are an ongoing experimental challenge. To address this, we used neutron reflectometry (NR) to measure water association with both hydrophobic and hydrophilic SAMs under both wet and dry conditions. SAMs used for this study were made from hydrophobic decanethiol mixed with hydrophilic 11-azido-1-undecanethiol with compositions of 0-100% of the azide-terminated thiol. All SAMs were formed by conventional solution incubation of a Au substrate immersed in ethanol. Each SAM was characterized by grazing incidence angle reflection-absorption Fourier transfer infrared spectroscopy, contact angle goniometry, and electrochemical methods to confirm it was a completely formed monolayer with evidence of extensive crystalline-like domains. NR measured significant absorption of water into each SAM, ranging from 1.6 to 5.7 water molecules per alkyl thiol, when SAMs were immersed in water. Water infiltration was independent of SAM composition and terminal group hydrophilicity. These results demonstrate that water accesses defects, fluid regions, and heterogeneous domains inherent to even well-formed SAMs.
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Affiliation(s)
- Whitney A Fies
- Department of Chemistry and Texas Materials Institute , The University of Texas at Austin , 2506 Speedway STOP A5300 , Austin , Texas 78712 , United States
| | | | - Jeffrey E Dick
- Department of Chemistry , The University of North Carolina at Chapel Hill , Chapel Hill , North Carolina 27599 , United States
| | - Logan M Wilder
- Department of Chemistry and Texas Materials Institute , The University of Texas at Austin , 2506 Speedway STOP A5300 , Austin , Texas 78712 , United States
| | | | | | | | - Lauren J Webb
- Department of Chemistry and Texas Materials Institute , The University of Texas at Austin , 2506 Speedway STOP A5300 , Austin , Texas 78712 , United States
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7
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Su P, Hu H, Warneke J, Belov ME, Anderson GA, Laskin J. Design and Performance of a Dual-Polarity Instrument for Ion Soft Landing. Anal Chem 2019; 91:5904-5912. [PMID: 30999743 DOI: 10.1021/acs.analchem.9b00309] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Pei Su
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
| | - Hang Hu
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
| | - Jonas Warneke
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Universität Leipzig, Linnestr. 2, 04103 Leipzig, Germany
| | | | - Gordon A. Anderson
- GAA Custom Engineering, LLC, POB 335, Benton City, Washington 99320, United States
| | - Julia Laskin
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
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Messina GML, Di Napoli B, De Zotti M, Mazzuca C, Formaggio F, Palleschi A, Marletta G. Molecular Sponge: pH-Driven Reversible Squeezing of Stimuli-Sensitive Peptide Monolayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:4813-4824. [PMID: 30864802 DOI: 10.1021/acs.langmuir.8b03895] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
The cyclic change of structure, thickness, and density, with pH switching from acidic (pH = 3) to basic (pH = 11) condition, has been revealed for chemisorbed monolayers of the peptide Lipo-Aib-Lys-Leu-Aib-Lys-Lys-Leu-Aib-Lys-Ile-Lol, a trichogin GA IV-analogue carrying Lys residues instead of Gly ones at positions 2, 5, 6, and 9, while a homologous peptide not containing Lys residues does not show any response to pH changes. Experimental and theoretical results, obtained by means of quartz crystal microbalance with dissipation monitoring, surface plasmon resonance, nanoplasmonic sensing technique, Fourier transform infrared-reflection attenuated spectroscopy and dynamic force spectroscopy, and molecular dynamics simulations provide detailed information on the overall monolayer structure changes with pH, including the analysis of the intra- and interchain peptide dynamics, the structure of the peptide layer/water/solid interface, as well as the position and role of solvation and nonsolvation water. The observed stimuli-responsive behavior of L1 peptide monolayers is accounted in terms of the occurrence of a pH-induced wetting/dewetting process, due to the pH-induced switching of the hydrophilic character of charged lysine groups to hydrophobic one of the same uncharged groups, along the peptide chain. This behavior in turn promotes the collective change of the aggregation state of the peptide chains. The present results may pave the way to critically reexamine the mechanism of stimuli-responsive systems.
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Affiliation(s)
- Grazia M L Messina
- Laboratory for Molecular Surfaces and Nanotechnology (LAMSUN), Department of Chemical Sciences , University of Catania and CSGI , Viale Andrea Doria 6 , 95125 Catania , Italy
| | - Benedetta Di Napoli
- Department of Chemical Sciences and Technologies , University of Roma Tor Vergata , Via della Ricerca Scientifica , 00133 Roma , Italy
| | - Marta De Zotti
- CB Padova Unit, CNR, Department of Chemistry , University of Padova , 35131 Padova , Italy
| | - Claudia Mazzuca
- Department of Chemical Sciences and Technologies , University of Roma Tor Vergata , Via della Ricerca Scientifica , 00133 Roma , Italy
| | - Fernando Formaggio
- CB Padova Unit, CNR, Department of Chemistry , University of Padova , 35131 Padova , Italy
| | - Antonio Palleschi
- Department of Chemical Sciences and Technologies , University of Roma Tor Vergata , Via della Ricerca Scientifica , 00133 Roma , Italy
| | - Giovanni Marletta
- Laboratory for Molecular Surfaces and Nanotechnology (LAMSUN), Department of Chemical Sciences , University of Catania and CSGI , Viale Andrea Doria 6 , 95125 Catania , Italy
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Laskin J, Johnson GE, Warneke J, Prabhakaran V. Von isolierten Ionen zu mehrschichtigen funktionellen Materialien durch sanfte Landung von Ionen. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201712296] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Julia Laskin
- Department of Chemistry Purdue University West Lafayette IN 47907 USA
| | - Grant E. Johnson
- Physical Sciences Division Pacific Northwest National Laboratory Richland WA 99352 USA
| | - Jonas Warneke
- Physical Sciences Division Pacific Northwest National Laboratory Richland WA 99352 USA
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Laskin J, Johnson GE, Warneke J, Prabhakaran V. From Isolated Ions to Multilayer Functional Materials Using Ion Soft Landing. Angew Chem Int Ed Engl 2018; 57:16270-16284. [DOI: 10.1002/anie.201712296] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Julia Laskin
- Department of Chemistry Purdue University West Lafayette IN 47907 USA
| | - Grant E. Johnson
- Physical Sciences Division Pacific Northwest National Laboratory Richland WA 99352 USA
| | - Jonas Warneke
- Physical Sciences Division Pacific Northwest National Laboratory Richland WA 99352 USA
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Laskin J, Hu Q. Reactive Landing of Gramicidin S and Ubiquitin Ions onto Activated Self-Assembled Monolayer Surfaces. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2017; 28:1304-1312. [PMID: 28290125 DOI: 10.1007/s13361-017-1614-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Revised: 01/15/2017] [Accepted: 01/16/2017] [Indexed: 06/06/2023]
Abstract
Using mass-selected ion deposition combined with in situ infrared reflection absorption spectroscopy (IRRAS), we examined the reactive landing of gramicidin S and ubiquitin ions onto activated self-assembled monolayer (SAM) surfaces terminated with N-hydroxysuccinimidyl ester (NHS-SAM) and acyl fluoride (COF-SAM) groups. Doubly protonated gramicidin S, [GS + 2H]2+, and two charge states of ubiquitin, [U + 5H]5+ and [U + 13H]13+, were used as model systems, allowing us to explore the effect of the number of free amino groups and the secondary structure on the efficiency of covalent bond formation between the projectile ion and the surface. For all projectile ions, ion deposition resulted in the depletion of IRRAS bands corresponding to the terminal groups on the SAM and the appearance of several new bands not associated with the deposited species. These new bands were assigned to the C=O stretching vibrations of COOH and COO- groups formed on the surface as a result of ion deposition. The presence of these bands was attributed to an alternative reactive landing pathway that competes with covalent bond formation. This pathway with similar yields for both gramicidin S and ubiquitin ions is analogous to the hydrolysis of the NHS ester bond in solution. The covalent bond formation efficiency increased linearly with the number of free amino groups and was found to be lower for the more compact conformation of ubiquitin compared with the fully unfolded conformation. This observation was attributed to the limited availability of amino groups on the surface of the folded conformation. Our results have provided new insights on the efficiency and mechanism of reactive landing of peptides and proteins onto activated SAMs. Graphical Abstract ᅟ.
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Affiliation(s)
- Julia Laskin
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, WA, 99352, USA.
| | - Qichi Hu
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, WA, 99352, USA
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