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Calmodulin-Binding Proteins: Proteins which bind calmodulin. They are found in many tissues and have a variety of functions including F-actin cross-linking properties, inhibition of cyclic nucleotide phosphodiesterase and calcium and magnesium ATPases.
 JoVE Biology

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

 Science Education: Essentials of Biochemistry

Co-Immunoprecipitation and Pull-Down Assays

JoVE Science Education

Co-immunoprecipitation (CoIP) and pull-down assays are closely related methods to identify stable protein-protein interactions. These methods are related to immunoprecipitation, a method for separating a target protein bound to an antibody from unbound proteins. In CoIP, an antibody-bound protein is itself bound to another protein that does not bind with the antibody, this is followed by a separation process that preserves the protein-protein complex. The difference in pull-down assays is that affinity-tagged bait proteins replace antibodies, and affinity chromatography is used to isolate protein-protein complexes. This video explains CoIP, pull-down assays, and their implementation in the laboratory. A step-by-step protocol for each technique is covered, including the reagents, apparatus, and instruments used to purify and analyze bound proteins. Additionally, the applications section of this video describes a procedure to study how myxovirus proteins inhibit influenza nucleoprotein, an investigation into the role of calcium ions in calmodulin via a pull-down assay, and a modified pull-down assay for characterizing transient protein interactions. Protein-protein interactions play a significant role in a wide variety of biological functions. The majority of protein-protein interactions and their biological effects h

 JoVE Biology

Proteomics to Identify Proteins Interacting with P2X2 Ligand-Gated Cation Channels

1Department of Physiology, David Geffen School of Medicine, University of California, Los Angeles, 2Department of Anesthesiology, David Geffen School of Medicine, University of California, Los Angeles, 3Department of Anesthesiology, Medicine and Physiology, David Geffen School of Medicine, University of California, Los Angeles


JoVE 1178

 JoVE Biology

Dissection of Hippocampal Dentate Gyrus from Adult Mouse

1Japan Science and Technology Agency, Core Research for Evolutionary Science and Technology (CREST), 2Division of Systems Medical Science, Institute for Comprehensive Medical Science, Fujita Health University, 3Department of Psychiatry, Graduate School of Medicine, Kyoto University, 4Genetic Engineering and Functional Genomics Group, Horizontal Medical Research Organization, Graduate School of Medicine, Kyoto University, 5Center for Genetic Analysis of Behavior, National Institute for Physiological Sciences, National Institutes of Natural Sciences


JoVE 1543

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 JoVE Immunology and Infection

Scalable High Throughput Selection From Phage-displayed Synthetic Antibody Libraries

1The Recombinant Antibody Network, 2The Banting and Best Department of Medical Research, University of Toronto, 3Antibiome Center, University of California, San Francisco at Mission Bay, 4Department of Biochemistry and Molecular Biology, The University of Chicago


JoVE 51492

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