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 JoVE Biology

Assembly of Nucleosomal Arrays from Recombinant Core Histones and Nucleosome Positioning DNA

1Biochemistry and Molecular Biology, Colorado State University


JoVE 50354

A method is presented for the reconstitution of model nucleosomal arrays from recombinant core histones and tandemly repeated nucleosome positioning DNA. We also describe how sedimentation velocity experiments in the analytical ultracentrifuge, and atomic force microscopy (AFM) are used to monitor the extent of nucleosomal array saturation after reconstitution.

 JoVE Biology

Separation of Spermatogenic Cell Types Using STA-PUT Velocity Sedimentation

1Department of Cell and Developmental Biology, University of Pennsylvania, 2Biomedical Graduate Studies, University of Pennsylvania, 3Department of Animal Biology and Center for Animal Transgenesis and Germ Cell Research, University of Pennsylvania, 4Department of Genetics, University of Pennsylvania, 5Department of Biology, University of Pennsylvania


JoVE 50648

The STA-PUT method allows for the separation of different populations of spermatogenic cells based on size and density.

 JoVE Biology

Assembly, Loading, and Alignment of an Analytical Ultracentrifuge Sample Cell

1National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Dynamics of Macromolecular Assembly, Laboratory of Bioengineering and Physical Science


JoVE 1530

The analytical ultracentrifuge (AUC) sample cell holds sample and reference buffer and during experiments and is exposed to high vacuum and rotor speeds up to 60,000 rpm. This video will demonstrate the rigorous attention to detail necessary for assembly, loading and alignment of this very important component of an AUC experiment.

 JoVE Biology

Simple and Efficient Technique for the Preparation of Testicular Cell Suspensions

1Departamento de Biología Molecular, Instituto de Investigaciones Biológicas Clemente Estable (IIBCE), 2Servicio de Citometría de Flujo y Clasificación Celular (SECIF), Instituto de Investigaciones Biológicas Clemente Estable, 3Sección Bioquímica, Facultad de Ciencias, Universidad de la República


JoVE 50102

A novel protocol for the mechanical preparation of testicular cell suspensions from rodent material, avoiding enzymes and detergents, is described. The method is very simple, fast, reproducible, and renders good quality cell suspensions, which are suitable for flow sorting and RNA extraction.

 JoVE Biology

Flow Cytometry Purification of Mouse Meiotic Cells

1Genome Plasticity Laboratory, Department of Cancer Biology, The Scripps Research Institute, 2Flow Cytometry Core, The Scripps Research Institute


JoVE 2602

An efficient method to obtain highly purified viable meiotic fractions from mouse testis is described, which combines a refined cell dissociation protocol with fluorescent activated cell sorting (FACS). This method takes advantage of differences in the DNA content and nuclear density of discrete meiotic fractions.

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