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Guanine Nucleotides:
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Measurement of Extracellular Ion Fluxes Using the Ion-selective Self-referencing Microelectrode Technique

1Department of Dermatology, Institute for Regenerative Cures, University of California, Davis, 2Departamento de Biologia, Centro de Biologia Molecular e Ambiental, Universidade do Minho, 3Department of Neurology and Center for Neuroscience, University of California, Davis Imaging of Dementia and Aging Laboratory, 4Department of Ophthalmology, Institute for Regenerative Cures, University of California, Davis

JoVE 52782


 Biology

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Methods to Discover Alternative Promoter Usage and Transcriptional Regulation of Murine Bcrp1

1Greenebaum Cancer Center, University of Maryland School of Medicine, 2Pharmaceutical Sciences, University of Maryland School of Pharmacy, 3Baltimore VA Medical Center, 4Membrane Transport and Biopharmaceutics, School of Pharmaceutical Sciences, Kanazawa University, 5Obstetrics, Gynecology and Reproductive Science, University of Pittsburgh, 6Magee Women's Research Institute, 7Obstetrics, Gynecology, Perinatal Research Branch (NICHD), Wayne State University School of Medicine, 8Medicine, University of Maryland School of Medicine, 9Pathology, University of Maryland School of Medicine, 10Pharmacology, University of Maryland School of Medicine, 11Experimental Therapeutics, University of Maryland School of Medicine

JoVE 53827


 Biology

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High-resolution Melting PCR for Complement Receptor 1 Length Polymorphism Genotyping: An Innovative Tool for Alzheimer's Disease Gene Susceptibility Assessment

1Department of Immunology, Reims University Hospitals, Robert Debré Hospital, 2Faculty of Medicine, LRN EA 4682, University of Reims Champagne-Ardenne, 3Department of Internal Medicine and Geriatrics, Reims University Hospitals, Maison Blanche Hospital, 4Faculty of Medicine, EA 3797, University of Reims Champagne-Ardenne

JoVE 56012


 Genetics

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Establishment of a Clinic-based Biorepository

1Affiliated Dermatology & Affiliated Laboratories, Midwestern University Osteopathic Postdoctoral Training Institute, Midwestern University, 2Department of Microbiology & Immunology, Arizona College of Osteopathic Medicine, Midwestern University, 3Biomedical Sciences Program, College of Health Sciences, Midwestern University

JoVE 55583


 Medicine

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Retroviral Scanning: Mapping MLV Integration Sites to Define Cell-specific Regulatory Regions

1Center for Genome Research, Department of Life Sciences, University of Modena and Reggio Emilia, 2Laboratory of Chromatin and Gene Regulation During Development, Imagine Institute, 3Institute for Biomedical Technologies, CNR, 4Généthon, 5Sorbonne Paris Cité - Université Paris Descartes

JoVE 55919


 Genetics

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High-throughput Detection Method for Influenza Virus

1Laboratory of Molecular Immunology and Immunotherapy, Blood Research Institute, 2Department of Microbiology, Mount Sinai School of Medicine, 3Laboratory of Molecular Genetics, Blood Research Institute, 4City of Milwaukee Health Department Laboratory, 5Division of Hematology-Oncology/BMT, Children's Hospital of Wisconsin, Medical College of Wisconsin, 6Division of Hematology and Oncology, Dept Medicine, Medical College of Wisconsin

JoVE 3623


 Immunology and Infection

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Measuring Spatial and Temporal Ca2+ Signals in Arabidopsis Plants

1Department of Horticulture and Landscape Architecture, Purdue University, 2Bindley Bioscience Center, Purdue University, 3Institute of Biotechnology, Jiangsu Academy of Agricultural Sciences, 4College of Environmental & Resource Science, Zhejiang University, 5Dryland Agriculture Research Centre, Shanxi Academy of Agricultural Sciences, 6Shanghai Center for Plant Stress Biology, Chinese Academy of Sciences

JoVE 51945


 Biology

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Density Gradient Ultracentrifugation

JoVE 5685

Density gradient ultracentrifugation is a common technique used to isolate and purify biomolecules and cell structures. This technique exploits the fact that, in suspension, particles that are more dense than the solvent will sediment, while those that are less dense will float. A high-speed ultracentrifuge is used to accelerate this process in order to separate biomolecules within a density gradient, which can be established by layering liquids of decreasing density in a centrifuge tube. The video will cover the principles of density gradient ultracentrifugation, including a procedure that demonstrates sample preparation, creation of a sucrose gradient, ultracentrifugation, and collection of fractionated analytes. The applications section discusses isolation of multi-protein complexes, isolation of nucleic acid complexes, and separation using cesium chloride density gradients. Density gradient ultracentrifugation is a common approach to isolate and purify cell structures for biochemical experiments. The technique uses a high-speed, or ultra, centrifuge to nondestructively separate cellular components in a density gradient. This video describes the principles of density gradient ultracentrifugation, provides a general procedure using a sucrose gradient, and discusses some applications.

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Microarray-based Identification of Individual HERV Loci Expression: Application to Biomarker Discovery in Prostate Cancer

1Joint Unit Hospices de Lyon-bioMérieux, 2Medical Diagnostic Discovery Department, BioMérieux, 3Department of Pathology and Cytology, Centre Hospitalier Lyon Sud, Hospices Civils de Lyon, 4Medical Faculty, Lyon 1 University, 5Data and Knowledge Laboratory, BioMérieux, 6Department of Biochemistry and Molecular Biology, Centre Hospitalier Lyon Sud, Hospices Civils de Lyon, 7Department of Urology, Centre Hospitalier Lyon Sud, Hospices Civils de Lyon

JoVE 50713


 Medicine

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Combining Single-molecule Manipulation and Imaging for the Study of Protein-DNA Interactions

1LENS - European Laboratory for Non-linear Spectroscopy, University of Florence, 2Chemistry Research Laboratory, University of Oxford, 3Department of Biology, University of Florence, 4Department of Physics and Astronomy, University of Florence, 5National Institute of Optics-National Research Council, Italy, 6International Center of Computational Neurophotonics

JoVE 51446


 Biology

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Purification of Transcripts and Metabolites from Drosophila Heads

1Department of Neurology, McKnight Brain Institute, University of Florida, 2Department of Entomology and Nematology, University of Florida, 3Genetics Institute, Department of Molecular Genetics and Microbiology, University of Florida, 4McKnight Brain Institute, Department of Neuroscience, Genetics Institute, Center for Translational Research on Neurodegenerative Diseases, and Center for Movement Disorders and Neurorestoration, University of Florida

JoVE 50245


 Biology

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Screening for Functional Non-coding Genetic Variants Using Electrophoretic Mobility Shift Assay (EMSA) and DNA-affinity Precipitation Assay (DAPA)

1Center for Autoimmune Genomics and Etiology, Cincinnati Children's Hospital, 2Medical Scientist Training Program, University of Cincinnati, 3Immunology Graduate Program, University of Cincinnati, 4Divisions of Biomedical Informatics and Developmental Biology, Cincinnati Children's Hospital

JoVE 54093


 Biology

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Lignin Down-regulation of Zea mays via dsRNAi and Klason Lignin Analysis

1The School of Plant Sciences, University of Arizona, 2Department of Chemical Engineering and Materials Science, DOE Great Lakes Bioenergy Research Center, Michigan State University, 3The Institute for Sustainable and Renewable Resources, The Institute for Advanced Learning and Research, 4Department of Plant, Soil and Microbial Sciences, Michigan State University

JoVE 51340


 Bioengineering

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Prediction and Validation of Gene Regulatory Elements Activated During Retinoic Acid Induced Embryonic Stem Cell Differentiation

1Sanford-Burnham-Prebys Medical Discovery Institute at Lake Nona, 2Department of Biochemistry and Molecular Biology, Research Center for Molecular Medicine, Medical and Health Science Center, University of Debrecen, 3MTA-DE “Lendulet” Immunogenomics Research Group, University of Debrecen

JoVE 53978


 Developmental Biology

14567
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