stored Protocols

Category: Cell Biology and Cell Culture: Flow Cytometry Protocols: Flow Cytometry Immunofluorescence Staining Protocols

Protocol provides a method for analysis of cell surface antigens using direct immunofluorescence, i.e., when the antibody being used is directly labeled to a fluorescent dye. After staining, the cells can be analyzed immediately by flow cytometry or fixed and stored for later analysis. - [Read Fluorescent Staining of Cell Surface Antigens on Viable Cells Using Direct Immunofluorescence]

Category: Bacterial Cell Culture Protocols: Bacterial Stocks Protocols

Bacterial strains may be stored indefinitely at low temperatures (- 20 degrees C and -80 degrees C) in 15 to 40% glycerol. - [Read Long Term Storage of Bacterial Strains Protocol]

Category: Yeast Cell Culture Protocols: Yeast Media, Solutions and Stocks Protocols

Yeast strains may be stored indefinitely at low temperatures (-80 degrees C). Two archiving methods are presented below. In Method A , the cells are grown on a plate, while in Method B the cells are grown in liquid culture. - [Read Long Term Storage of Yeast Stocks Protocol]

Category: Cell Biology and Cell Culture: Flow Cytometry Protocols: DNA Staining Protocols for Flow Cytometry

This protocol describes a method for quantitative measurement of DNA using propidium iodide (PI) staining and flow cytometry. PI stains all double-stranded regions of both DNA and RNA by intercalating between the stacked bases of the double helix. PI cannot penetrate an intact cell membrane; therefore, cells are fixed prior to staining. The ethanol-fixed cells can be stored unstained at 4°C for days, or even weeks, and then stained and analyzed. - [Read Measurement of DNA Content Using Propidium Iodide (PI) Staining of Fixed Whole Cells Protocol]

Category: Cell Biology and Cell Culture: Cell Culture Techniques: Cell Line Preservation Freezing

Following propagation to 1 X 108 cells, lymphoblastoid cells are conveniently stored at -80 degrees C to preserve the high molecular weight DNA in the cells until the DNA is purified. This procedure describes the steps required to harvest and freeze the c - [Read Method: Preparation of Lymphocyte Cell Pellet for Storage]

Category: Peptide Protocols: Peptide Storage

Great peptide storage information. Lerner. Peptides are provided as lyophilized product that should be stored as dry powder at -20°C to -70°C in a desiccator, if possible. After lyophilization, peptides retain significant amounts of water. Peptides are slowly degraded particularly the cysteine-containing peptides are oxidized over time at -20°C. - [Read Peptide Storage Information]

Category: Fungi Protocols: Neurospora Protocols

Procedure for preparing and transforming spheroplasts of Neurospora crassa. The procedure is designed to produce a large number of spheroplasts to be stored frozen at -80°. - [Read Preparing and Transforming Spheroplasts of Neurospora crassa Protocol]

Category: Immunohistochemistry Protocols: Antibody Staining Protocols

Frozen tissue sections show good preservation of tissue structure and antigens. The principle disadvantages of using them in immunostaining are that the specimens must be stored frozen, and a special microtome, known as a cryostat, is required. Also, many clinical specimens are not available in this form, and most classic histological descriptions of tissue structure and pathology are based on the use of paraffin-embedded sections of formalin-fixed material. - [Read Preparing Frozen Tissue Sections for Immunostaining Protocol]

Category: Cell Biology and Cell Culture: Cell Culture Techniques: Cell Line Preservation Freezing

Cell lines are reactivated and grown to a count of 1 x 108 cells. The cells are pelleted and stored frozen at -80 degrees C prior to DNA extraction. Donis-Keller. - [Read Reactivating Cell Lines and Cell Growth for DNA Preparation]

Category: Cytoskeleton Protocols: Microtubules Protocols

Recycle tubulin fractions stored at -80¡C after the PC column and store the recycled tubulin in small aliquots for day-to-day use. Generally store recycled tubulin in Injection Buffer (IB) without free GTP. This is done because depolymerization appears to be much better in IB, IB is ideal for microinjections/adding tubulin to extracts, and the absence of free GTP makes polymerization with GMPCPP, a very useful GTP analog that has ~5-10X lower affinity than GTP for tubulin. - [Read Recycling Tubulin Protocol]

Category: Antibody Protocols: Antibody Handling Protocols

Ascitic fluid from B-cell-derived tumors is an extremely concentrated solution of specific antibodies. Ascitic fluid is often stored at -70ºC to prevent proteolytic degradation. - [Read Storage of Ascitic Fluid Protocol]

Category: Xenopus Protocols: Xenopus Egg Extracts Protocols

Protocol for Xenopus sperm nuclei preparation. Sperm Nuclei can be made and stored as a stock for later use with Cytostatic Factor Extracts. - [Read Xenopus Sperm Nuclei Preparation Protocol]