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CD40 Ligand: A membrane glycoprotein and differentiation antigen expressed on the surface of T-cells that binds to Cd40 antigens on B-Lymphocytes and induces their proliferation. Mutation of the gene for Cd40 ligand is a cause of Hyper-igm immunodeficiency syndrome, Type 1.
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Flow-sorting and Exome Sequencing of the Reed-Sternberg Cells of Classical Hodgkin Lymphoma

1Innovation Laboratory, Center for Molecular Oncology, Memorial Sloan Kettering Cancer Center, 2Flow-Sorting Core Facility, Weill Cornell Medical College, 3Department of Laboratory Medicine, University of Washington, 4Department of Physiology and Biophysics, Institute for Computational Biomedicine, Weill Cornell Medical College, 5Department of Pathology and Laboratory Medicine, Weill Cornell Medical College, 6Department of Laboratory Medicine, Memorial Sloan Kettering Cancer Center

JoVE 54399


 Genetics

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An ELISA Based Binding and Competition Method to Rapidly Determine Ligand-receptor Interactions

1Applied Microbiology Research, Department of Biomedicine, University of Basel, 2Department of Biosystems Science and Engineering, ETH Zurich, and Swiss Institute of Bioinformatics, 3Swiss Institute of Bioinformatics, 4Li Ka Shing Institute for Virology, University of Alberta, 5Regional Infectious Diseases Unit, University of Edinburgh, 6Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, 7Infection Biology, Department of Biomedicine, University of Basel, 8Clinical Microbiology, University Hospital Basel

JoVE 53575


 Chemistry

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Fluorescence Biomembrane Force Probe: Concurrent Quantitation of Receptor-ligand Kinetics and Binding-induced Intracellular Signaling on a Single Cell

1Woodruff School of Mechanical Engineering, Petit Institute for Bioengineering and Biosciences, Georgia Institute of Technology, 2Coulter Department of Biomedical Engineering, Georgia Institute of Technology, 3Charles Perkins Centre, The University of Sydney, 4Institute of Biophysics, Laboratory of RNA Biology, Chinese Academy of Sciences, 5University of Chinese Academy of Sciences, 6School of Medicine and Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Zhejiang University

JoVE 52975


 Bioengineering

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Using Confocal Analysis of Xenopus laevis to Investigate Modulators of Wnt and Shh Morphogen Gradients

1Department of Biomedical Science, The Bateson Centre, University of Sheffield, 2Institute of Genetic Medicine, Newcastle University, 3Department of Cardiovascular Science, The Bateson Centre, University of Sheffield, 4School of Biochemistry, University of Bristol, 5Biology Department, University of York

JoVE 53162


 Developmental Biology

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Measuring G-protein-coupled Receptor Signaling via Radio-labeled GTP Binding

1The Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, 2Department of Neurology and neurosurgery, Johns Hopkins University School of Medicine, 3Departments of Pharmacology and Molecular Sciences, Johns Hopkins University School of Medicine, 4Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine

JoVE 55561


 Biochemistry

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Coordination Chemistry Complexes

JoVE 10179

Source: Laboratory of Dr. Neal Abrams — SUNY College of Environmental Science and Forestry

Transition metals are found everywhere from vitamin supplements to electroplating baths. Transition metals also make up the pigments in many paints and compose all minerals. Typically, transition metals are found in the cationic form since they readily oxidize, or lose electrons, and are surrounded by electron donors called ligands. These ligands do not form ionic or covalent bonds with the metal center, rather they take on a third type of bond known as coordinate-covalent. The coordinate-covalent bond between a ligand and a metal is dynamic, meaning that ligands are continuously exchanging and re-coordinating around the metal center. The identities of both the metal and the ligand dictates which ligands will bond preferentially over another. In addition, color and magnetic properties are also due to the types of complexes that are formed. The coordination compounds that form are analyzed using a variety of instruments and tools. This experiment explores why so many complexes are possible and uses a spectrochemical (color and chemical) method to help identify the type of coordination complex that forms.


 General Chemistry

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Molecular Orbital (MO) Theory

JoVE 10447

Source: Tamara M. Powers, Department of Chemistry, Texas A&M University

This protocol serves as a guide in the synthesis of two metal complexes featuring the ligand 1,1'-bis(diphenylphosphino)ferrocene (dppf): M(dppf)Cl2, where M = Ni or Pd. While both of these transition metal complexes are 4-coordinate, they exhibit different geometries at the metal center. Using molecular orbital (MO) theory in conjunction with 1H NMR and Evans method, we will determine the geometry of these two compounds.


 Inorganic Chemistry

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