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Cell Biology: The study of the structure, behavior, growth, reproduction, and pathology of cells; and the function and chemistry of cellular components.
 JoVE Biology

Metabolic Labeling of Newly Transcribed RNA for High Resolution Gene Expression Profiling of RNA Synthesis, Processing and Decay in Cell Culture

1Max von Pettenkofer Institute, 2Department of Medicine, University of Cambridge, 3Institute for Informatics, Ludwig-Maximilians-University Munich


JoVE 50195

Total cellular RNA provides a poor template for studying short-term changes in RNA synthesis and decay as well as the kinetics of RNA processing. Here, we describe metabolic labeling of newly transcribed RNA with 4-thiouridine followed by thiol-specific biotinylation and purification of newly transcribed RNA allowing to overcome these limitations.

 JoVE Bioengineering

Isolation of Cellular Lipid Droplets: Two Purification Techniques Starting from Yeast Cells and Human Placentas

1Department of Biochemistry and Cellular and Molecular Biology, University of Tennessee, 2Department of Chemical and Biomolecular Engineering, University of Tennessee


JoVE 50981

Two techniques for isolating cellular lipid droplets from 1) yeast cells and 2) human placentas are presented. The centerpiece of both procedures is density gradient centrifugation, where the resulting floating layer containing the droplets can be readily visualized by eye, extracted, and quantified by Western Blot analysis for purity.

 JoVE Bioengineering

Isolation of Cellular Lipid Droplets: Two Purification Techniques Starting from Yeast Cells and Human Placentas

1Department of Biochemistry and Cellular and Molecular Biology, University of Tennessee, 2Department of Chemical and Biomolecular Engineering, University of Tennessee


JoVE 50981

Two techniques for isolating cellular lipid droplets from 1) yeast cells and 2) human placentas are presented. The centerpiece of both procedures is density gradient centrifugation, where the resulting floating layer containing the droplets can be readily visualized by eye, extracted, and quantified by Western Blot analysis for purity.

 JoVE Bioengineering

Isolation of Cellular Lipid Droplets: Two Purification Techniques Starting from Yeast Cells and Human Placentas

1Department of Biochemistry and Cellular and Molecular Biology, University of Tennessee, 2Department of Chemical and Biomolecular Engineering, University of Tennessee


JoVE 50981

Two techniques for isolating cellular lipid droplets from 1) yeast cells and 2) human placentas are presented. The centerpiece of both procedures is density gradient centrifugation, where the resulting floating layer containing the droplets can be readily visualized by eye, extracted, and quantified by Western Blot analysis for purity.

 JoVE Biology

Viability Assays for Cells in Culture

1Division of Pharmaceutical Sciences, Mylan School of Pharmacy, Duquesne University


JoVE 50645

Therapeutic compounds are often first examined in vitro with viability assays. Blind cell counts by a human observer can be highly sensitive to small changes in cell number but do not assess function. Computerized viability assays, as described here, can assess both structure and function in an objective manner.

 JoVE Biology

Using Caenorhabditis elegans as a Model System to Study Protein Homeostasis in a Multicellular Organism

1Department of Life Sciences, National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev


JoVE 50840

To study the relationship between protein homeostasis, stress and aging, we monitored changes in protein folding by following protein dysfunction, protein localization in the cell and protein stability at the organismal, cellular and protein levels, using the genetically tractable metazoan Caenorhabditis elegans as a model system.

 JoVE Neuroscience

Detection of the Genome and Transcripts of a Persistent DNA Virus in Neuronal Tissues by Fluorescent In situ Hybridization Combined with Immunostaining

1Virus and Centromere Team, Centre de Génétique et Physiologie Moléculaire et Cellulaire, CNRS UMR 5534, 2Université de Lyon 1, 3Laboratoire d'excellence, LabEX DEVweCAN, 4Institut de Virologie Moléculaire et Structurale, CNRS UPR 3296, 5Centre de Recherche en Cancérologie de Lyon, INSERM U1052, CNRS UMR 5286


JoVE 51091

We established a fluorescent in situ hybridization protocol for the detection of a persistent DNA virus genome within tissue sections of animal models. This protocol enables studying infection process by codetection of the viral genome, its RNA products, and viral or cellular proteins within single cells.

 JoVE Biology

Protocols for Implementing an Escherichia coli Based TX-TL Cell-Free Expression System for Synthetic Biology

1Department of Biology, California Institute of Technology, 2Department of Bioengineering, California Institute of Technology, 3Synthetic Biology Center, Department of Bioengineering, Massachusetts Institute of Technology, 4School of Physics and Astronomy, University of Minnesota


JoVE 50762

This five-day protocol outlines all steps, equipment, and supplemental software necessary for creating and running an efficient endogenous Escherichia coli based TX-TL cell-free expression system from scratch. With reagents, the protocol takes 8 hours or less to setup a reaction, collect, and process data.

 JoVE Biology

Direct Imaging of ER Calcium with Targeted-Esterase Induced Dye Loading (TED)

1Institute for Clinical Neurobiology, University of Wuerzburg, 2Department of Synapses - Circuits - Plasticity, Max Planck Institute of Neurobiology, Martinsried, 3Walter Brendel Centre of Experimental Medicine, Ludwig-Maximilians University of Munich


JoVE 50317

Targeted-esterase induced dye loading (TED) supports the analysis of intracellular calcium store dynamics by fluorescence imaging. The method bases on targeting of a recombinant Carboxylesterase to the endoplasmic reticulum (ER), where it improves the local unmasking of synthetic low-affinity Ca2+ indicator dyes in the ER lumen.

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