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 JoVE Chemistry

Rapid Colorimetric Assays to Qualitatively Distinguish RNA and DNA in Biomolecular Samples

1Department of Chemistry, University of Virginia


JoVE 50225

A suite of colorimetric assays is described for rapidly distinguishing protein, RNA, DNA, and reducing sugars in potentially heterogeneous biomolecular samples.

 JoVE Bioengineering

High-throughput Synthesis of Carbohydrates and Functionalization of Polyanhydride Nanoparticles

1Department of Chemical and Biological Engineering, Iowa State University, 2Department of Chemistry, Iowa State University


JoVE 3967

In this article, a high throughput method is presented for the synthesis of oligosaccharides and their attachment to the surface of polyanhydride nanoparticles for further use in targeting specific receptors on antigen presenting cells.

 JoVE Biology

Comprehensive Compositional Analysis of Plant Cell Walls (Lignocellulosic biomass) Part II: Carbohydrates

1Great Lakes Bioenergy Research Center, Michigan State University (MSU), 2Great Lakes Bioenergy Research Center and DOE-Plant Research Lab, Michigan State University (MSU)


JoVE 1837

Plant biomass is a major carbon-neutral renewable resource that could be used for the production of biofuels. Plant biomass consists mainly of cell walls, a structurally complex composite material termed lignocellulosics. Here we describe a protocol for a comprehensive analysis of the content and composition of wall derived carbohydrates.

 JoVE Chemistry

Isolation and Preparation of Bacterial Cell Walls for Compositional Analysis by Ultra Performance Liquid Chromatography

1Department of Bioengineering, Stanford University, 2Department of Molecular Biology and Laboratory for Molecular Infection Medicine Sweden, Umeå Centre for Microbial Research, Umeå University, 3Campus de Cantoblanco, Universidad Autonoma de Madrid, 4Department of Microbiology and Immunology, Stanford University School of Medicine


JoVE 51183

The bacterial cell wall is composed of peptidoglycan, a macromolecular network of sugar strands crosslinked by peptides. Ultra Performance Liquid Chromatography provides high resolution and throughput for novel discoveries of peptidoglycan composition. We present a procedure for the isolation of cell walls (sacculi) and their subsequent preparation for analysis via UPLC.

 JoVE Biology

Reconstitution of a Kv Channel into Lipid Membranes for Structural and Functional Studies

1Department of Cell Biology, University of Texas Southwestern Medical Center at Dallas


JoVE 50436

Procedures for complete reconstitution of a prototype voltage-gated potassium channel into lipid membranes are described. The reconstituted channels are suitable for biochemical assays, electrical recordings, ligand screening and electron crystallographic studies. These methods may have general applications to the structural and functional studies of other membrane proteins.

 JoVE Environment

High-throughput Fluorometric Measurement of Potential Soil Extracellular Enzyme Activities

1Natural Resource Ecology Laboratory, Colorado State University, 2Biosciences Division, Oak Ridge National Laboratory, 3Department of Bioengineering, University of Colorado


JoVE 50961

To measure potential rates of soil extracellular enzyme activities, synthetic substrates that are bound to a fluorescent dye are added to soil samples. Enzyme activity is measured as the fluorescent dye is released from the substrate by an enzyme-catalyzed reaction, where higher fluorescence indicates more substrate degradation.

 JoVE Biology

Collection and Analysis of Arabidopsis Phloem Exudates Using the EDTA-facilitated Method

1Biochemistry and Molecular Biology, Michigan State Universtiy


JoVE 51111

Knowledge of the composition of the phloem sap as well as the mechanism of its loading and long-distance transport is essential for the understanding of long-distance signaling in plant development and stress/pathogen response and of assimilate transport. This manuscript describes the collection of phloem exudates using the EDTA-facilitated method.

 JoVE Immunology and Infection

Mass Spectrometric Analysis of Glycosphingolipid Antigens

1Undergraduate Program, Rice University, 2Proteomics Facility, Department of Pathology, University of Texas MD Anderson Cancer Center, 3Department of Melanoma Medical Oncology, University of Texas MD Anderson Cancer Center, 4University of Texas Graduate School of Biological Sciences at Houston


JoVE 4224

A specific and sensitive method to gain insight into the expression profile of glycosphingolipid antigens in immune organs and cells is described. The method takes advantage of the ion trap mass spectrometry allowing step-wise fragmentation of glycosphingolipid molecules for structural analysis in comparison to chemically synthesized standards.

 JoVE Neuroscience

Isolation and Quantification of Botulinum Neurotoxin From Complex Matrices Using the BoTest Matrix Assays

1BioSentinel Inc., Madison, WI


JoVE 51170

The BoTest Matrix botulinum neurotoxin (BoNT) detection assays rapidly purify and quantify BoNT from a range of sample matrices. Here, we present a protocol for the detection and quantification of BoNT from both solid and liquid matrices and demonstrate the assay with BOTOX, tomatoes, and milk.

 JoVE Biology

Depletion of Ribosomal RNA for Mosquito Gut Metagenomic RNA-seq

1Department of Biology, New Mexico State University


JoVE 50093

A ribosomal RNA (rRNA) depletion protocol was developed to enrich messenger RNA (mRNA) for RNA-seq of the mosquito gut metatranscriptome. Sample specific rRNA probes, which were used to remove rRNA via subtraction, were created from the mosquito and its gut microbes. Performance of the protocol can result in the removal of approximately 90-99% of rRNA.

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