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Wang R, Guo J, Li G, Wang X, Yang J, Li Q, Zhang G. Identification of the Linear Fc-Binding Site on the Bovine IgG1 Fc Receptor (boFcγRIII) Using Synthetic Peptides. Vet Sci 2024; 11:24. [PMID: 38250930 PMCID: PMC10818675 DOI: 10.3390/vetsci11010024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Revised: 12/18/2023] [Accepted: 01/03/2024] [Indexed: 01/23/2024] Open
Abstract
The bovine IgG1 Fc receptor (boFcγRIII) is a homologue to human FcγRIII (CD16) that binds bovine IgGI with medium-low affinity. In order to identify the Fc-binding site on the bovine IgG1 Fc receptor (boFcγRIII), peptides derived from the second extracellular domain (EC2) of boFcγRIII were synthesized and conjugated with the carrier protein. With a Dot-blot assay, the ability of the peptides to bind bovine IgG1 was determined, and the IgG1-binding peptide was also identified via truncation and mutation. The minimal peptide AQRVVN corresponding to the sequence 98-103 of boFcγRIII bound bovine IgG1 in Dot-blot, suggesting that it represents a linear ligand-binding site located in the putative A-B loop of the boFcγRIII EC2 domain. Mutation analysis of the peptide showed that the residues of Ala98, Gln99, Val101, Val102 and Asn103 within the Fc-binding site are critical for IgG1 binding on boFcγRIII. The functional peptide identified in this paper is of great value to the IgG-Fc interaction study and FcR-targeting drug development.
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Affiliation(s)
- Ruining Wang
- Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China; (R.W.); (J.G.); (J.Y.)
- College of Veterinary Medicine, Henan University of Animal Husbandry and Economics, Zhengzhou 450046, China
| | - Junqing Guo
- Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China; (R.W.); (J.G.); (J.Y.)
| | - Ge Li
- College of Veterinary Medicine, Northwest A&F University, Xianyang 712100, China;
| | - Xun Wang
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou 450046, China;
| | - Jifei Yang
- Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China; (R.W.); (J.G.); (J.Y.)
| | - Qingmei Li
- Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China; (R.W.); (J.G.); (J.Y.)
| | - Gaiping Zhang
- Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China; (R.W.); (J.G.); (J.Y.)
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou 450046, China;
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Disease and Zoonose, Yangzhou University, Yangzhou 225009, China
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2
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Therapeutic strategies targeting pro-fibrotic macrophages in interstitial lung disease. Biochem Pharmacol 2023; 211:115501. [PMID: 36921632 DOI: 10.1016/j.bcp.2023.115501] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 03/03/2023] [Accepted: 03/07/2023] [Indexed: 03/18/2023]
Abstract
Idiopathic pulmonary fibrosis (IPF) is the representative phenotype of interstitial lung disease where severe scarring develops in the lung interstitium. Although antifibrotic treatments are available and have been shown to slow the progression of IPF, improved therapeutic options are still needed. Recent data indicate that macrophages play essential pro-fibrotic roles in the pathogenesis of pulmonary fibrosis. Historically, macrophages have been classified into two functional subtypes, "M1" and "M2," and it is well described that "M2" or "alternatively activated" macrophages contribute to fibrosis via the production of fibrotic mediators, such as TGF-β, CTGF, and CCL18. However, highly plastic macrophages may possess distinct functions and phenotypes in the fibrotic lung environment. Thus, M2-like macrophages in vitro and pro-fibrotic macrophages in vivo are not completely identical cell populations. Recent developments in transcriptome analysis, including single-cell RNA sequencing, have attempted to depict more detailed phenotypic characteristics of pro-fibrotic macrophages. This review will outline the role and characterization of pro-fibrotic macrophages in fibrotic lung diseases and discuss the possibility of treating lung fibrosis by preventing or reprogramming the polarity of macrophages. We also utilized a systematic approach to review the literature and identify novel and promising therapeutic agents that follow this treatment strategy.
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Liu J, Toy R, Vantucci C, Pradhan P, Zhang Z, Kuo KM, Kubelick KP, Huo D, Wen J, Kim J, Lyu Z, Dhal S, Atalis A, Ghosh-Choudhary SK, Devereaux EJ, Gumbart JC, Xia Y, Emelianov SY, Willett NJ, Roy K. Bifunctional Janus Particles as Multivalent Synthetic Nanoparticle Antibodies (SNAbs) for Selective Depletion of Target Cells. NANO LETTERS 2021; 21:875-886. [PMID: 33395313 PMCID: PMC8176937 DOI: 10.1021/acs.nanolett.0c04833] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Monoclonal antibodies (mAb) have had a transformative impact on treating cancers and immune disorders. However, their use is limited by high development time and monetary cost, manufacturing complexities, suboptimal pharmacokinetics, and availability of disease-specific targets. To address some of these challenges, we developed an entirely synthetic, multivalent, Janus nanotherapeutic platform, called Synthetic Nanoparticle Antibodies (SNAbs). SNAbs, with phage-display-identified cell-targeting ligands on one "face" and Fc-mimicking ligands on the opposite "face", were synthesized using a custom, multistep, solid-phase chemistry method. SNAbs efficiently targeted and depleted myeloid-derived immune-suppressor cells (MDSCs) from mouse-tumor and rat-trauma models, ex vivo. Systemic injection of MDSC-targeting SNAbs efficiently depleted circulating MDSCs in a mouse triple-negative breast cancer model, enabling enhanced T cell and Natural Killer cell infiltration into tumors. Our results demonstrate that SNAbs are a versatile and effective functional alternative to mAbs, with advantages of a plug-and-play, cell-free manufacturing process, and high-throughput screening (HTS)-enabled library of potential targeting ligands.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Jianguo Wen
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois 60517, United States
| | | | | | | | | | - Shohini K Ghosh-Choudhary
- School of Medicine, University of Pittsburgh, 3550 Terrace St., Pittsburgh, Pennsylvania 15213, United States
| | - Emily J Devereaux
- Orthopaedics Department, Emory University, Atlanta, Georgia 30322, United States
- Research Service, Atlanta VA Medical Center, Decatur, Georgia 30033, United States
| | | | | | | | - Nick J Willett
- Orthopaedics Department, Emory University, Atlanta, Georgia 30322, United States
- Research Service, Atlanta VA Medical Center, Decatur, Georgia 30033, United States
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Caaveiro JMM, Kiyoshi M, Tsumoto K. Structural analysis of Fc/FcγR complexes: a blueprint for antibody design. Immunol Rev 2015; 268:201-21. [DOI: 10.1111/imr.12365] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Jose M. M. Caaveiro
- Department of Bioengineering; School of Engineering; The University of Tokyo; Tokyo Japan
| | - Masato Kiyoshi
- Department of Bioengineering; School of Engineering; The University of Tokyo; Tokyo Japan
- Division of Biological Chemistry and Biologicals; National Institute of Health Sciences; Tokyo Japan
| | - Kouhei Tsumoto
- Department of Bioengineering; School of Engineering; The University of Tokyo; Tokyo Japan
- Institute of Medical Science; The University of Tokyo; Tokyo Japan
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5
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McEnaney PJ, Fitzgerald KJ, Zhang AX, Douglass EF, Shan W, Balog A, Kolesnikova MD, Spiegel DA. Chemically synthesized molecules with the targeting and effector functions of antibodies. J Am Chem Soc 2014; 136:18034-43. [PMID: 25514603 PMCID: PMC4291750 DOI: 10.1021/ja509513c] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Indexed: 12/21/2022]
Abstract
This article reports the design, synthesis, and evaluation of a novel class of molecules of intermediate size (approximately 7000 Da), which possess both the targeting and effector functions of antibodies. These compounds—called synthetic antibody mimics targeting prostate cancer (SyAM-Ps)—bind simultaneously to prostate-specific membrane antigen and Fc gamma receptor I, thus eliciting highly selective cancer cell phagocytosis. SyAMs have the potential to combine the advantages of both small-molecule and biologic therapies, and may address many drawbacks associated with available treatments for cancer and other diseases.
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Affiliation(s)
- Patrick J McEnaney
- Department of Chemistry, Yale University , 225 Prospect Street, New Haven, Connecticut 06511, United States
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Gibson-Corley KN, Bockenstedt MM, Li H, Boggiatto PM, Phanse Y, Petersen CA, Bellaire BH, Jones DE. An in vitro model of antibody-enhanced killing of the intracellular parasite Leishmania amazonensis. PLoS One 2014; 9:e106426. [PMID: 25191842 PMCID: PMC4156363 DOI: 10.1371/journal.pone.0106426] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Accepted: 07/30/2014] [Indexed: 11/21/2022] Open
Abstract
Footpad infection of C3HeB/FeJ mice with Leishmania amazonensis leads to chronic lesions accompanied by large parasite loads. Co-infecting these animals with L. major leads to induction of an effective Th1 immune response that can resolve these lesions. This cross-protection can be recapitulated in vitro by using immune cells from L. major-infected animals to effectively activate L. amazonensis-infected macrophages to kill the parasite. We have shown previously that the B cell population and their IgG2a antibodies are required for effective cross-protection. Here we demonstrate that, in contrast to L. major, killing L. amazonensis parasites is dependent upon FcRγ common-chain and NADPH oxidase-generated superoxide from infected macrophages. Superoxide production coincided with killing of L. amazonensis at five days post-activation, suggesting that opsonization of the parasites was not a likely mechanism of the antibody response. Therefore we tested the hypothesis that non-specific immune complexes could provide a mechanism of FcRγ common-chain/NADPH oxidase dependent parasite killing. Macrophage activation in response to soluble IgG2a immune complexes, IFN-γ and parasite antigen was effective in significantly reducing the percentage of macrophages infected with L. amazonensis. These results define a host protection mechanism effective during Leishmania infection and demonstrate for the first time a novel means by which IgG antibodies can enhance killing of an intracellular pathogen.
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Affiliation(s)
- Katherine N. Gibson-Corley
- Department of Veterinary Pathology, College of Veterinary Medicine, Iowa State University, Ames, Iowa, United States of America
| | - Marie M. Bockenstedt
- Department of Veterinary Pathology, College of Veterinary Medicine, Iowa State University, Ames, Iowa, United States of America
| | - Huijuan Li
- Department of Veterinary Pathology, College of Veterinary Medicine, Iowa State University, Ames, Iowa, United States of America
| | - Paola M. Boggiatto
- Department of Veterinary Pathology, College of Veterinary Medicine, Iowa State University, Ames, Iowa, United States of America
| | - Yashdeep Phanse
- Department of Veterinary Microbiology and Preventive Medicine, College of Veterinary Medicine, Iowa State University, Ames, Iowa, United States of America
| | - Christine A. Petersen
- Department of Veterinary Pathology, College of Veterinary Medicine, Iowa State University, Ames, Iowa, United States of America
| | - Bryan H. Bellaire
- Department of Veterinary Microbiology and Preventive Medicine, College of Veterinary Medicine, Iowa State University, Ames, Iowa, United States of America
| | - Douglas E. Jones
- Department of Veterinary Pathology, College of Veterinary Medicine, Iowa State University, Ames, Iowa, United States of America
- * E-mail:
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Flexible or fixed: a comparative review of linear and cyclic cancer-targeting peptides. Future Med Chem 2012; 4:1601-18. [PMID: 22917248 DOI: 10.4155/fmc.12.75] [Citation(s) in RCA: 104] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Peptides can serve as versatile cancer-targeting ligands and have been used for clinically relevant applications such as cancer imaging and therapy. A current and long-standing focus within peptide research is the creation of structurally constrained peptides generated through cyclization. Cyclization is envisioned to enhance the selective binding, uptake, potency and stability of linear precursors. This review compares closely related linear and cyclic peptides in these respects. Peptide cyclization generally improves the selective binding and stability of linear precursors; however, not all cyclization strategies and constrained geometries enhance these properties to the same extent. In some instances, linear analogues actually have better cancer-targeting properties compared with their cyclic counterparts. Although cyclization does not necessarily improve the cancer-targeting properties of linear analogues, cyclic peptides may obtain properties that allow them to be used for additional applications. This review aims to convey the advantages and limitations of cyclic cancer-targeting peptides.
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Li Y, Dooley CT, Misler JA, Debevec G, Giulianotti MA, Cazares ME, Maida L, Houghten RA. Fluorescent mu selective opioid ligands from a mixture based cyclic peptide library. ACS COMBINATORIAL SCIENCE 2012; 14:673-9. [PMID: 23110623 DOI: 10.1021/co300110t] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A positional scanning cyclic peptide library was generated using a penta-peptide thioester scaffold. Glycine was fixed at position R(1). Diaminopropionic acid was fixed at position R(3), with its γ-amino attaching to an anthraniloyl group. Positions R(2) and R(4) contained 36 L- and D- amino acids and position R(5) contained 19 L- amino acids. Cyclization was performed in a mixture of acetonitrile and 1.5 M aqueous imidazole solution (7:1 v/v) at room temperature for 5 days. No significant cross-oligomerization was detected under the cyclization conditions. The library was screened in a binding assay for mu opioid receptor, identifying the active amino acid mixture at each position. A total of 40 individual cyclic peptides were identified and synthesized by the combinations of the most active amino acid mixtures found at three positions 5 × 4 × 2. Two cyclic peptides exhibited high binding affinities to opioid receptor. The most active cyclic peptide in the library was yielded to have Tyr at R(2), D-Lys at R(4), and Tyr at R(5). Further investigation on this compound revealed the side chain-to-tail isomer to have greater binding affinity (14 nM) than the head-to-tail isomer (39 nM). Both isomers were selective for the mu-opioid receptor.
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Affiliation(s)
- Yangmei Li
- Torrey Pines Institute for Molecular Studies, 11350 SW Village Parkway, Port Saint Lucie, Florida 34987, United
States
| | - Colette T. Dooley
- Torrey Pines Institute for Molecular Studies, 11350 SW Village Parkway, Port Saint Lucie, Florida 34987, United
States
| | - Jaime A. Misler
- Torrey Pines Institute for Molecular Studies, 11350 SW Village Parkway, Port Saint Lucie, Florida 34987, United
States
| | - Ginamarie Debevec
- Torrey Pines Institute for Molecular Studies, 11350 SW Village Parkway, Port Saint Lucie, Florida 34987, United
States
| | - Marc A. Giulianotti
- Torrey Pines Institute for Molecular Studies, 11350 SW Village Parkway, Port Saint Lucie, Florida 34987, United
States
| | - Margaret E. Cazares
- Torrey Pines Institute for Molecular Studies, 11350 SW Village Parkway, Port Saint Lucie, Florida 34987, United
States
| | - Laura Maida
- Torrey Pines Institute for Molecular Studies, 11350 SW Village Parkway, Port Saint Lucie, Florida 34987, United
States
| | - Richard A. Houghten
- Torrey Pines Institute for Molecular Studies, 11350 SW Village Parkway, Port Saint Lucie, Florida 34987, United
States
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9
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Fc receptor-targeted therapies for the treatment of inflammation, cancer and beyond. Nat Rev Drug Discov 2012; 11:311-31. [PMID: 22460124 DOI: 10.1038/nrd2909] [Citation(s) in RCA: 256] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The direct or indirect targeting of antibody Fc receptors (FcRs) presents unique opportunities and interesting challenges for the treatment of inflammatory diseases, cancer and infection. Biological responses induced via the Fc portions of antibodies are powerful, complex and unusual, and comprise both activating and inhibitory effects. These properties can be exploited in the engineering of therapeutic monoclonal antibodies to improve their activity in vivo. FcRs have also emerged as key participants in the pathogenesis of several important autoimmune diseases, including systemic lupus erythematosus and rheumatoid arthritis. Therapeutic approaches based on antagonizing FcR function with small molecules or biological drugs such as monoclonal antibodies and recombinant soluble FcR ectodomains have gained momentum. This Review addresses various strategies to manipulate FcR function to overcome immune complex-mediated inflammatory diseases, and considers approaches to improve antibody-based anticancer therapies.
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Ullman CG, Frigotto L, Cooley RN. In vitro methods for peptide display and their applications. Brief Funct Genomics 2011; 10:125-34. [PMID: 21628313 DOI: 10.1093/bfgp/elr010] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
The presentation of recombinant peptide libraries linked to their coding sequence can be referred to as 'peptide display'. Phage display is the most widely practiced peptide display technology but more recent alternatives such as CIS display, ribosome display and mRNA display offer advantages over phage for speed, library size and the display of unnatural amino acids. These have provided researchers with tools to address some of the failings of peptides such as their low affinity, low stability and inability to cross biological membranes. In this review, we assess some of the recent advances in peptide display and its application.
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Affiliation(s)
- Christopher G Ullman
- Isogenica Ltd., The Mansion, Chesterford Research Park, Little Chesterford, Essex, UK.
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Stewart R, Thom G, Levens M, Güler-Gane G, Holgate R, Rudd PM, Webster C, Jermutus L, Lund J. A variant human IgG1-Fc mediates improved ADCC. Protein Eng Des Sel 2011; 24:671-8. [PMID: 21596686 DOI: 10.1093/protein/gzr015] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Ribosome display was applied to the Fc region of human immunoglobulin G (IgG1) to select for improved binding to human FcγRIIIa, the receptor expressed on human natural killer cells that mediates antibody-dependent cellular cytotoxicity (ADCC). A library of human Fcγ1 variants was generated using error-prone polymerase chain reaction, and subjected to multiple rounds of ribosome display selection against progressively decreasing concentrations of soluble human FcγRIIIa, to enrich for improved binders. Radioimmunoassay and alphascreen analyses of the aglycosylated IgG-Fc output revealed variants with improved binding to FcγRIIIa relative to wild-type IgG-Fc. Subsequent expression in human (HEK-EBNA) cells generated glycosylated IgGs with modified activity in ADCC assays. One particular variant, 125_B01 triggered enhanced ADCC (EC(50) up to four-fold reduced with increased maximal lysis) relative to wild-type antibody, having more equal levels of ADCC for each allotype (V158/F158) of FcγRIIIa. Deconvolution of individual replacements within the variant showed that improved function arose from the Phe243Leu replacement within the CH2 domain, rather than the CH3 domain replacements Thr393Ala or His433Pro. Surprisingly, the oligosaccharide profiles of 125_B01 indicated more oligosaccharide chains lacking fucose, or with bisecting N-acetylglucosamine relative to wild-type IgG1, which correlates with improved function and the replacement Phe243Leu that is a carbohydrate contact residue within the C(H)2 domain.
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Ahsanullah, Rademann J. Cyclative cleavage through dipolar cycloaddition: polymer-bound azidopeptidylphosphoranes deliver locked cis-triazolylcyclopeptides as privileged protein binders. Angew Chem Int Ed Engl 2011; 49:5378-82. [PMID: 20583012 DOI: 10.1002/anie.200904980] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Ahsanullah
- Leibniz Institute of Molecular Pharmacology (FMP), Robert-Rössle-Strasse 10, 13125 Berlin, Germany
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Ahsanullah, Rademann J. Cyclisierende Abspaltungen über dipolare Cycloadditionen: Polymergebundene Azidopeptidylphosphorane liefern konformativ fixierte cis-Triazolylcyclopeptide als privilegierte Proteinbinder. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.200904980] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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