Download or read book Synthesis Characterization and Application of Some Covalent Fluorescent Probes for Proteins written by Earl Nelson Hudson and published by . This book was released on 1970 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Protein Analysis by Capillary Electrophoresis with Laser induced Fluorescence Detection written by Franklin H. Welder and published by . This book was released on 2004 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of a Bio Molecular Fluorescent Probe Used in Kinetic Target Guided Synthesis for the Identification of Inhibitors of Enzymatic and Protein Protein Interaction Targets written by Katya Pavlova Nacheva and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract Fluorescent molecules used as detection probes and sensors provide vital information about the chemical events in living cells. Despite the large variety of available fluorescent dyes, new improved fluorogenic systems are of continued interest. The Diaryl-substituted Maleimides (DMs) exhibit excellent photophysical properties but have remained unexplored in bioscience applications. Herein we present the identification and full spectroscopic characterization of 3,4-bis(2,4-difluorophenyl)-maleimide and its first reported use as a donor component in Förster resonance energy transfer (FRET) systems. The FRET technique is often used to visualize proteins and to investigate protein-protein interactions in vitro as well as in vivo. The analysis of the photophysical properties of 3,4-bis(2,4-difluorophenyl)-maleimide revealed a large Stokes shift of 140 nm in MeOH, a very good fluorescence quantum yield in DCM (Ffl 0.61), and a high extinction coefficient [epsilon](340) 48,400 M-1cm-1, thus ranking this molecule as superior over other reported moieties from this class. In addition, 3,4-bis(2,4-difluorophenyl)-maleimide was utilized as a donor component in two FRET systems wherein different molecules were chosen as suitable acceptor components - a fluorescent quencher (DABCYL) and another compatible fluorophore, tetraphenylporphyrin (TPP). It has been demonstrated that by designing a FRET peptide which contains the DM donor moiety and the acceptor (quencher) motif, a depopulation of the donor excited state occurred via intermolecular FRET mechanism, provided that the pairs were in close proximity. The Förster-Radius (R0) calculated for this FRET system was 36 Å and a Förster-Radius (R0) of 26 Å was determined for the second FRET system which contained TPP as an acceptor. The excellent photophysical properties of this fluorophore reveal a great potential for further bioscience applications.
Download or read book Fluorescent Analogs of Biomolecular Building Blocks written by Marcus Wilhelmsson and published by John Wiley & Sons. This book was released on 2016-04-04 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluorescent Analogs of Biomolecular Building Blocks focuses on the design of fluorescent probes for the four major families of macromolecular building blocks. Compiling the expertise of multiple authors, this book moves from introductory chapters to an exploration of the design, synthesis, and implementation of new fluorescent analogues of biomolecular building blocks, including examples of small-molecule fluorophores and sensors that are part of biomolecular assemblies.
Download or read book Fluorescent Energy Transfer Nucleic Acid Probes written by Vladimir V. Didenko and published by Springer Science & Business Media. This book was released on 2008-02-04 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluorescent nucleic acid probes, which use energy transfer, include such constructs as molecular beacons, molecular break lights, Scorpion primers, TaqMan probes, and others. These probes signal detection of their targets by changing either the intensity or the color of their fluorescence. Not surpr- ingly, these luminous, multicolored probes carry more flashy names than their counterparts in the other fields of molecular biology. In recent years, fluor- cent probes and assays, which make use of energy transfer, have multiplied at a high rate and have found numerous applications. However, in spite of this explosive growth in the field, there are no manuals summarizing different p- tocols and fluorescent probe designs. In view of this, the main objective of Fluorescent Energy Transfer Nucleic Acid Probes: Designs and Protocols is to provide such a collection. Oligonucleotides with one or several chromophore tags can form fluor- cent probes capable of energy transfer. Energy transport within the probe can occur via the resonance energy transfer mechanism, also called Förster tra- fer, or by non-Förster transfer mechanisms. Although the probes using Förster transfer were developed and used first, the later non-Förster-based probes, such as molecular beacons, now represent an attractive and widely used option. The term “fluorescent energy transfer probes” in the title of this book covers both Förster-based fluorescence resonance energy transfer (FRET) probes and probes using non-FRET mechanisms. Energy transfer probes serve as molecule-size sensors, changing their fluorescence upon detection of various DNA reactions.
Download or read book Synthesis and Characterization of Fluorescent Molecular Rotors written by Jamie Yen-Ka Lam and published by . This book was released on 2020 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt: Small molecule fluorescent probes provide a non-invasive way to obtain accurate microviscosity measurements for biological analyses, especially when bulk measurements are not feasible. A family of push-pull fluorescent dyes, inspired by the benzothiazole motif of Thioflavin T, are reported, along with preliminary data on their use for visualizing long-range bacterial signaling and binding affinities for amyloids. By altering the [pi]-wire through increased conjugation and heteroatom substitution, a red-shifted ThT analogue was successfully synthesized. Synthetic analogues of previously reported fluorescent probes were also synthesized. Increasing the [pi]-wire from phenyl to naphthyl induced a bathochromic shift. It was also observed that switching from an ester to an amide altered photophysical properties in both sets of analogues. There was a slight hypsochromic shift due to the amide, likely attributed to the slight decrease in electron-withdrawing character of the acceptor group. Moreover, the emission intensity of the FRET donor decreased in the amide ratiometric system as compared to that of its ester counterpart, potentially indicating an enhancement of energy transfer between the donor and acceptor pair. These studies point towards ways to optimize the chemical structures of various fluorescent probes for specific applications.
Download or read book Fluorescent Proteins written by Kevin F. Sullivan and published by Elsevier. This book was released on 2007-12-14 with total page 613 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new edition of Fluorescent Proteins presents current applications of autofluorescent proteins in cell and molecular biology authored by researchers from many of the key laboratories in the field. Starting from a current review of the broad palette of fluorescent proteins available, several chapters focus on key autofluorescent protein variants, including spectral variants, photodynamic variants as well as chimeric FP approaches. Molecular applications are addressed in chapters that detail work with single molecules, approaches to generating protein fusions and biosensors as well as analysis of protein-protein interactions in vivo by FRET, fluorescence polarization and fluorescence cross correlation techniques. A number of approaches to in vivo dynamics are presented, including FRAP, photoactivation, and 4-dimensional microscopy. Behavior of spindle components, membrane proteins, mRNA trafficking as well as analysis of cell types in tissues and in development are detailed and provide models for a wide variety of experimental approaches. In addition, several chapters deal directly with the computational issues involved in processing multidimensional image data and using fluorescent imaging to probe cellular behavior with quantitative modeling. This volume brings together the latest perspective and techniques on fluorescent proteins and will be an invaluable reference in a wide range of laboratories.
Download or read book Fluorescent Proteins II written by Gregor Jung and published by Springer Science & Business Media. This book was released on 2012-01-05 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluorescent proteins are intimately connected to research in the life sciences. Tagging of gene products with fluorescent proteins has revolutionized all areas of biosciences, ranging from fundamental biochemistry to clinical oncology, to environmental research. The discovery of the Green Fluorescent Protein, its first, seminal application and the ingenious development of a broad palette of fluorescence proteins of other colours, was consequently recognised with the Nobel Prize for Chemistry in 2008. Fluorescent Proteins II highlights the physicochemical and biophysical aspects of fluorescent protein technology beyond imaging. It is tailored to meet the needs of physicists, chemists and biologists who are interested in the fundamental properties of fluorescent proteins, while also focussing on specific applications. The implementations described are cutting-edge studies and exemplify how the physical and chemical properties of fluorescent proteins can stimulate novel findings in life sciences.
Download or read book Synthesis and Characterization of New Light Emitting Probes for Sensitive Detection of Bio molecules and Live Cells written by Shyamala Pravin Pillai and published by . This book was released on 2013 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: A variety of contemporary analytical platforms in technical and biological applications take advantage of labeling the objects of interest with fluorescent or luminescent tracers. Luminescent tracers take advantage of the unique property of some lanthanide metals to absorb and emit light. Long lifetime of lanthanide emission allows temporal gating of the signal, which avoids the short-lived background of interfering sample components. This property in combination with large Stokes shift contributes to extreme sensitivity of detection (ca. 10−13-10−14 M), which makes lanthanide-based probes suitable for large variety of challenging tasks ( e.g., intracellular detection of single DNA/RNA, or protein molecules, microbial pathogen detection in human specimens, tracing analysis, etc.). Luminescent probes include antenna fluorophore that absorbs light and transfers the excitation energy to a lanthanide metal tethered to antenna through chelation. The probe also contains crosslinking group that allows covalent labeling of the molecule of interest. Despite great potentials of lanthanide-based tracers the wide spread of the technology is impeded by very high price of commercially available probes to their complex structure. The goal is to develop novel approaches for the synthesis of lanthanide probes with improved quantum efficiency. This work discusses development of new strategies for synthesis of antena-fluorophores, development of new methods for introduction of the crosslinking groups in the luminescent probes and elucidates the mechanisms of chemical reactions leading to principal synthetic intermediates. New quinoline and quinolone based fluorescent compounds were synthesized, whose light emission can be conveniently tuned by simple structural modifications. Developed probes represent high-quantum yield, large Stokes shift fluorophores with amine-reactive and click-reactive groups convenient for conjugation. Some of these compounds can be used as sensitizers for lanthanide emission in design of highly sensitive luminescent probes. Obtained probes demonstrate efficient derivatization reactions allowing introduction of amine- or click-reactive crosslinking groups into the fluorophores. The reactivity of synthesized compounds is confirmed in reaction with low molecular weight nucleophiles as well as with click-reactive DNA-oligonucleotide counterparts. These reactive derivatives can be used for covalent attachment of the fluorophores to various biomolecules of interest including nucleic acids, proteins, live cells and small cellular metabolites. Synthesized compounds were characterized using N MR, steady-state and time-resolved fluorescence spectroscopy, as well UV absorption spectroscopy. This work also discusses the development of fluorescent derivatives of the antifungal drugs, posaconazole and caspofungin, for diagnostic imaging of fungal cells. Invasive fungal infections (IFI's) are a growing threat to human health particularly, with increase in the number of immune-compromised patient population, such as organ transplant recipients, al logeneic B MT, hematologic cancers; AIDS etc. The diagnosis of fungal infections is a complicated task and requires a combination of clinical observations, laboratory investigation, and radiological or other diagnostic imaging methods. Only 25% of I FI cases are diagnosed pre-mortem due to the current diagnostic challenges, which justifies the development of express diagnostic procedures. To address the issue fluorescent derivatives of the antifungal drugs, posaconazole and caspofungin, were synthesized. The fluorescent derivatives retained strong and highly specific binding to their cellular targets rendering the cells fluorescent. This new affinity-based approach strongly facilitates the detection of fungal pathogen thereby overcoming the current diagnostic challenges and can be used for clinical diagnostics. The power of this approach is not limited to fungal pathogens, but in fact represents a broader platform useful for detection of other classes of infections, both in the biological specimens and in the whole body using contemporary 3-D imaging approaches like fluorescence based in vivo imaging, luminescence imaging, positron emission tomography approach, and computer-assisted X-ray tomography.
Download or read book Green Fluorescent Protein written by Martin Chalfie and published by John Wiley & Sons. This book was released on 2005-11-18 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the discovery of the gene for green fluorescent protein (GFP), derived from jellyfish, this protein that emits a green glow has initiated a revolution in molecular biosciences. With this tool, it is now possible to visualize nearly any protein of interest in any cell or tissue of any species. Since the publication of the first edition, there have been tremendously significant technological advances, including development of new mutant variants. Proteins are now available in yellow and blue, and Novel Fluorescent Proteins (NFPs) have expanded their utility in developing biosensors, biological markers, and other biological applications. This updated, expanded new edition places emphasis on the rise of NFPs, including new chapters on NFP properties with detailed protocols, applications of GFPs and NFPs in industry research, and biosensors. This book provides a solid theoretical framework, along with detailed, practical guidance on use of GFPs and NFPs with discussion of potential pitfalls. The expert contributors provide real examples in showing how to tailor GFP/NFP to specific systems, maximize expression, and enhance detection.
Download or read book Handbook of Fluorescent Dyes and Probes written by R. W. Sabnis and published by John Wiley & Sons. This book was released on 2015-05-05 with total page 467 pages. Available in PDF, EPUB and Kindle. Book excerpt: A COMPLETE, UP-TO-DATE RESOURCE OF INFORMATION ON MORE THAN 150 FLUORESCENT DYES AND PROBES Handbook of Fluorescent Dyes and Probes is the most comprehensive volume available on the subject, covering all the available dyes and probes known to date in the literature for uses in various fields. Top dye expert Dr. Ram Sabnis organizes the compounds alphabetically by the most commonly used chemical name. He presents an easy-to-use reference complete with novel ideas for breakthrough research in medical, biological, chemical, color, material, physical and related allied fields. The ease of use of the handbook is further enhanced by various appendixes provided at the end of the book to conveniently and easily locate the dye as per the reader's need. This is the first book to give the CAS registry numbers, chemical structure, Chemical Abstract (CA) index name, all other chemical names, Merck Index number, chemical/dye class, molecular formula, molecular weight, physical form, solubility, melting point, boiling point, pKa, absorption maxima, emission maxima, molar extinction coefficient, and quantum yield of fluorescent dyes and probes, as well as to provide access to synthetic procedures (lab scale and industrial scale) of dyes and probes in a single source. This user-friendly handbook also features references on safety, toxicity and adverse effects of dyes and probes on humans, animals and the environment, including: acute/chronic toxicity aquatic toxicity carcinogenicity cytotoxicity ecotoxicity genotoxocity hematotoxicity hepatotoxicity immunotoxicity marine toxicity microbial toxicity mutagenicity nephrotoxicity neurotoxicity nucleic acid damage oral toxicity phototoxicity phytotoxicity reproductive toxicity skin toxicity Containing imaging/labeling applications, biological/medical applications and industrial applications, Handbook of Fluorescent Dyes and Probes is a convenient, vital resource for industrial and academic researchers, and a valuable desktop reference for medical professionals, lab supervisors, scientists, chemists, biologists, engineers, physicists, intellectual property professionals, students, and professors. Includes all fluorescent dyes & probes known to date and provides a complete, up-to-date library of information in one reference/handbook Includes more than 300 fluorescent dyes & probes organized alphabetically by the commonly used Chemical Name Provides access to synthesis procedures (lab scale and industrial scale) of fluorescent dyes & probes First book to provide references on safety, toxicity and adverse effects of fluorescent dyes and probes on humans, animals, and the environment User-friendly and convenient resource guide for chemical, biological, medical, and intellectual property professionals in a broad range of disciplines
Download or read book Principles of Fluorescence Spectroscopy written by Joseph R. Lakowicz and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 487 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluorescence methods are being used increasingly in biochemical, medical, and chemical research. This is because of the inherent sensitivity of this technique. and the favorable time scale of the phenomenon of fluorescence. 8 Fluorescence emission occurs about 10- sec (10 nsec) after light absorp tion. During this period of time a wide range of molecular processes can occur, and these can effect the spectral characteristics of the fluorescent compound. This combination of sensitivity and a favorable time scale allows fluorescence methods to be generally useful for studies of proteins and membranes and their interactions with other macromolecules. This book describes the fundamental aspects of fluorescence. and the biochemical applications of this methodology. Each chapter starts with the -theoreticalbasis of each phenomenon of fluorescence, followed by examples which illustrate the use of the phenomenon in the study of biochemical problems. The book contains numerous figures. It is felt that such graphical presentations contribute to pleasurable reading and increased understand ing. Separate chapters are devoted to fluorescence polarization, lifetimes, quenching, energy transfer, solvent effects, and excited state reactions. To enhance the usefulness of this work as a textbook, problems are included which illustrate the concepts described in each chapter. Furthermore, a separate chapter is devoted to the instrumentation used in fluorescence spectroscopy. This chapter will be especially valuable for those perform ing or contemplating fluorescence measurements. Such measurements are easily compromised by failure to consider a number of simple principles.
Download or read book Handbook of Fluorescent Dyes and Probes written by R. W. Sabnis and published by John Wiley & Sons. This book was released on 2015-06-02 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: A COMPLETE, UP-TO-DATE RESOURCE OF INFORMATION ON MORE THAN 150 FLUORESCENT DYES AND PROBES Handbook of Fluorescent Dyes and Probes is the most comprehensive volume available on the subject, covering all the available dyes and probes known to date in the literature for uses in various fields. Top dye expert Dr. Ram Sabnis organizes the compounds alphabetically by the most commonly used chemical name. He presents an easy-to-use reference complete with novel ideas for breakthrough research in medical, biological, chemical, color, material, physical and related allied fields. The ease of use of the handbook is further enhanced by various appendixes provided at the end of the book to conveniently and easily locate the dye as per the reader's need. This is the first book to give the CAS registry numbers, chemical structure, Chemical Abstract (CA) index name, all other chemical names, Merck Index number, chemical/dye class, molecular formula, molecular weight, physical form, solubility, melting point, boiling point, pKa, absorption maxima, emission maxima, molar extinction coefficient, and quantum yield of fluorescent dyes and probes, as well as to provide access to synthetic procedures (lab scale and industrial scale) of dyes and probes in a single source. This user-friendly handbook also features references on safety, toxicity and adverse effects of dyes and probes on humans, animals and the environment, including: acute/chronic toxicity aquatic toxicity carcinogenicity cytotoxicity ecotoxicity genotoxocity hematotoxicity hepatotoxicity immunotoxicity marine toxicity microbial toxicity mutagenicity nephrotoxicity neurotoxicity nucleic acid damage oral toxicity phototoxicity phytotoxicity reproductive toxicity skin toxicity Containing imaging/labeling applications, biological/medical applications and industrial applications, Handbook of Fluorescent Dyes and Probes is a convenient, vital resource for industrial and academic researchers, and a valuable desktop reference for medical professionals, lab supervisors, scientists, chemists, biologists, engineers, physicists, intellectual property professionals, students, and professors. Includes all fluorescent dyes & probes known to date and provides a complete, up-to-date library of information in one reference/handbook Includes more than 300 fluorescent dyes & probes organized alphabetically by the commonly used Chemical Name Provides access to synthesis procedures (lab scale and industrial scale) of fluorescent dyes & probes First book to provide references on safety, toxicity and adverse effects of fluorescent dyes and probes on humans, animals, and the environment User-friendly and convenient resource guide for chemical, biological, medical, and intellectual property professionals in a broad range of disciplines
Download or read book Design Synthesis and Characterization of Mechanosensitive Dual Fluorescent Dyes as Potential Probes for Biological Applications written by Susantha Ganegamage and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chapter 3 of this dissertation explores a hypothesis that leverages the seesaw photophysical model for N-aryl (2,3- and 1,8-) naphthalimides. The Heagy group initially developed this model to understand the dual fluorescence effect concerning the electron donor or electron-withdrawing substituents. This study envisions the design and synthesis of novel dual fluorescence molecules for a new class of N-aryl-phenanthridinone dyes. The applied photophysical model further investigates these dyes with a substitution pattern opposite naphthalimide systems. Interestingly, predictive computational modeling shows that the substituent pattern, used previously for 2,3-naphthalimides, relies on these groups getting placed on rings in opposite positions for N-aryl-phenanthridinones. Chapter 4, provides an overall conclusion of the and future directions for both parts of the research. In chapter 5, a complete description of experimental data is provided for the characterization of all the dye systems presented. This data includes a detailed synthesis procedure, characterization, purity analysis by HPLC, absorptivity calculation, fluorescence lifetime measurements, quantum yield determination, biological evaluation and fluorescence titration.
Download or read book Protected Metal Clusters From Fundamentals to Applications written by and published by Elsevier. This book was released on 2015-09-06 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: Protected Metal Clusters: From Fundamentals to Applications surveys the fundamental concepts and potential applications of atomically precise metal clusters protected by organic ligands. As this class of materials is now emerging as a result of breakthroughs in synthesis and characterization that have taken place over the last few years, the book provides the first reference with a focus on these exciting novel nanomaterials, explaining their formation, and how, and why, they play an important role in the future of molecular electronics, catalysis, sensing, biological imaging, and medical diagnosis and therapy. Surveys the fundamental concepts and potential applications of atomically precise metal clusters protected by organic ligands. Provides well-organized, tutorial style chapters that are ideal for teaching and self-study In-depth descriptions by top scientists in the field Presents the state-of-the art of protected metal clusters and their future prospects
Download or read book Peptide Synthesis and Applications written by John Howl and published by Springer Science & Business Media. This book was released on 2008-02-02 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hands-on experts describe in step-by-step detail the key methodologies of contemporary peptide synthesis and illustrate their numerous applications. The techniques presented include protocols for chemical ligation, the synthesis of cyclic and phosphotyrosine-containing peptides, lipoamino acid- and sugar-conjugated peptides, and peptide purification and analyses. Additional chapters detail methodologies and instrumentation for high-throughput peptide synthesis, many different applications of peptides as novel research tools and biological probes, and the design and application of fluorescent substrate-based peptides that can be used to determine the selectivity and activity of peptidases. A practical guide to the identification of proteins using mass spectrometric analyses of peptide mixtures is also included.
