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General Laboratory Techniques

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Basic Methods in Cellular and Molecular Biology

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 JoVE Bioengineering

Insertion of Flexible Neural Probes Using Rigid Stiffeners Attached with Biodissolvable Adhesive

1Materials Engineering Division, Lawrence Livermore National Laboratory, 2UCSF Center for Integrative Neuroscience and the Department of Physiology, University of California, San Francisco


JoVE 50609

Insertion of flexible neural microelectrode probes is enabled by attaching probes to rigid stiffeners with polyethylene glycol (PEG). A unique assembly process ensures uniform and repeatable attachment. After insertion into tissue, the PEG dissolves and the stiffener is extracted. An in vitro test method evaluates the technique in agarose gel.

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 JoVE Biology

FtsZ Polymerization Assays: Simple Protocols and Considerations

1Department of Molecular Microbiology, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen


JoVE 50844

Polymerization of FtsZ is essential for bacterial cell division. In this report, we detail simple protocols to monitor FtsZ polymerization activity and discuss the influence of buffer composition. The protocols can be used to study the interaction of FtsZ with regulatory proteins or antibacterial drugs that affect FtsZ polymerization.

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 JoVE Applied Physics

Measuring Material Microstructure Under Flow Using 1-2 Plane Flow-Small Angle Neutron Scattering

1Center for Neutron Science, Department of Chemical and Biomolecular Engineering, University of Delaware, 2NIST Center for Neutron Research, National Institute of Standards and Technology, 3Institut Laue-Langevin


JoVE 51068

A shear cell is developed for small-angle neutron scattering measurements in the velocity-velocity gradient plane of shear and is used to characterize complex fluids. Spatially resolved measurements in the velocity gradient direction are possible for studying shear-banding materials. Applications include investigations of colloidal dispersions, polymer solutions, and self-assembled structures.

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 JoVE Environment

Transient Gene Expression in Tobacco using Gibson Assembly and the Gene Gun

1Synthetic Biology Platform, Wyss Institute for Biologically Inspired Engineering, Harvard University, 2Department of Systems Biology, Harvard Medical School, 3Department of Biotechnology, Delft University of Technology


JoVE 51234

This work describes a novel method for selectively targeting subcellular organelles in plants, assayed using the BioRad Gene Gun.

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 JoVE Chemistry

Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides

1Institute of Chemistry and The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem


JoVE 50946

This paper describes the formation of highly ordered peptide-based structures by the spontaneous process of self-assembly. The method utilizes commercially available peptides and common lab equipment. This technique can be applied to a large variety of peptides and may lead to the discovery of new peptide-based assemblies.

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 JoVE Biology

A Protocol for Computer-Based Protein Structure and Function Prediction

1Center for Computational Medicine and Bioinformatics, University of Michigan, 2Center for Bioinformatics and Department of Molecular Bioscience, University of Kansas


JoVE 3259

Guidelines for computer based structural and functional characterization of protein using the I-TASSER pipeline is described. Starting from query protein sequence, 3D models are generated using multiple threading alignments and iterative structural assembly simulations. Functional inferences are thereafter drawn based on matches to proteins with known structure and functions.

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 JoVE Biology

Infinium Assay for Large-scale SNP Genotyping Applications

1Arthritis and Clinical Immunology, Oklahoma Medical Research Foundation


JoVE 50683

A protocol is described that uses Illumina's Infinium assays to perform large-scale genotyping. These assays can reliably genotype millions of SNPs across hundreds of individual DNA samples in three days. Once generated, these genotypes can be used to check for associations with a variety of different diseases or phenotypes.

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 JoVE Biology

Mouse Genome Engineering Using Designer Nucleases

1Institute of Laboratory Animal Science, University of Zurich, 2Department of Genetics, Cell Biology & Development and Center for Genome Engineering, University of Minnesota


JoVE 50930

Designer nucleases such as zinc finger nucleases (ZFNs) and transcription activator-like effector nucleases (TALENs) can be used to modify the genome of mouse preimplantation embryos by triggering both the nonhomologous end joining (NHEJ) and homologous recombination (HR) pathways. These advances enable the rapid generation of mice with precise genetic modifications.

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 JoVE Environment

Experimental Protocol for Manipulating Plant-induced Soil Heterogeneity

1Department of Biology, Case Western Reserve University


JoVE 51580

Understanding the role of environmental heterogeneity in species coexistence has typically focused on types of heterogeneity that are extrinsic to the community’s species composition. We provide novel detailed methods for creating soil heterogeneity treatments using soils subject to plant-soil feedback conditioning, or heterogeneity intrinsic to the community composition.

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 JoVE Chemistry

Origami Inspired Self-assembly of Patterned and Reconfigurable Particles

1Department of Chemical and Biomolecular Engineering, The Johns Hopkins University, 2Department of Chemistry, The Johns Hopkins University


JoVE 50022

We describe experimental details of the synthesis of patterned and reconfigurable particles from two dimensional (2D) precursors. This methodology can be used to create particles in a variety of shapes including polyhedra and grasping devices at length scales ranging from the micro to centimeter scale.

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