cultures Protocols

Category: Bacteria Transformation Protocols

Protocol reproducibly generates competent cultures of E. coli that yield 1 x 108 to 3 x 108 transformed colonies/µg of plasmid DNA. The protocol works optimally when the bacterial culture is grown at 18°C. If a suitable incubator is not available, a standard bacterial shaker can be set up in a 4°C cold room and regulated to 18°C. - [Read Preparation and Transformation of Competent E. Coli: "Ultra-Competent" Cells Protocol]

Category: E Coli Protocols: E coli Transformation Protocols

Protocol reproducibly generates competent cultures of E. coli that yield 1 x 108 to 3 x 108 transformed colonies/µg of plasmid DNA. The protocol works optimally when the bacterial culture is grown at 18°C. If a suitable incubator is not available, a standard bacterial shaker can be set up in a 4°C cold room and regulated to 18°C. - [Read Preparation and Transformation of Competent E. Coli: "Ultra-Competent" Cells Protocol]

Category: Stem Cell Protocols: Feeder Cell Preparation Protocols

MEF feeders are prepared weekly to provide a substrate for undifferentiated embryonic stem (ES) cells. Primary MEF cells are thawed, established in culture, treated with mitomycin C to halt their proliferation so they cannot overgrow the ES cultures, and then replated onto dishes convenient for ES cell culture. This protocol can also be used to prepare feeder cells from STO fibroblast cell lines. - [Read Preparation of Mouse Embryonic Fibroblast (MEF) Feeder Plates Protocol]

Category: Nucleic Acid Purification Protocols: DNA Isolation Protocols: DNA Plasmid Preps Protocols

Plasmid DNA is isolated from large-scale (500 ml) bacterial cultures by treatment with alkali and SDS. - [Read Preparation of Plasmid DNA by Alkaline Lysis with SDS: Maxipreparation Protocol]

Category: Nucleic Acid Purification Protocols: DNA Isolation Protocols: DNA Plasmid Preps Protocols

Plasmid DNA is isolated from intermediate-scale (20-50 ml) bacterial cultures by treatment with alkali and SDS. - [Read Preparation of Plasmid DNA by Alkaline Lysis with SDS: Midipreparation Protocol]

Category: Nucleic Acid Purification Protocols: DNA Isolation Protocols: DNA Plasmid Preps Protocols

Plasmid DNA is isolated from small-scale (1-2 ml) bacterial cultures by treatment with alkali and SDS. - [Read Preparation of Plasmid DNA by Alkaline Lysis with SDS: Minipreparation Protocol]

Category: Nucleic Acid Purification Protocols: DNA Isolation Protocols: DNA Plasmid Preps Protocols

Plasmid DNA is isolated from large-scale (500 ml) bacterial cultures by treatment with Triton X-100 and lysozyme, followed by heating.  This method is not recommended for preparing plasmid DNA from strains of E. coli that express endonuclease A (endA+ strains). - [Read Preparation of Plasmid DNA by Large-scale Boiling Lysis Protocol]

Category: Nucleic Acid Purification Protocols: DNA Isolation Protocols: DNA Plasmid Preps Protocols

Plasmid DNA is isolated from small-scale (1-2 ml) bacterial cultures by treatment with Triton X-100 and lysozyme, followed by heating.  This method is not recommended for preparing plasmid DNA from strains of E. coli that express endonuclease A (endA+ strains). - [Read Preparation of Plasmid DNA by Small-scale Boiling Lysis Protocol]

Category: Cell Biology and Cell Culture: Hepatocyte Cell Culture

USC Liver Transplant Surgery Program and Center for Liver Disease. Preparation of primary cultures of rat hepatocytes (or freshly isolated hepatocytes). - [Read Preparation of primary cultures of rat hepatocytes (or freshly isolated hepatocytes)]

Category: C. elegans Protocols: C. elegans Cell Culture Protocols

Protocol describes how to seed plates with E. coli OP50 for C. elegans cultures. Includes: Bacterial Stock Plate Preparation; Bacterial Broth Preparation; Seeding Bacteria Plates for Culturing Worms. - [Read Preparation of Seeded NGM Plates For Worm Food Protocol]

Category: Viral Culture and Isolation Protocols: Viral Culture Protocols

High-titer stocks of bacteriophage {lambda} are easily prepared by infecting small-scale bacterial cultures. - [Read Preparing Stocks of Bacteriophage {lambda} by Small-scale Liquid Culture Protocol]

Category: Cell Biology and Cell Culture: Endothelial Cell Protocols

Protocol for primary cultures of HUVECs. Includes: Buffers and reagents (Fetal calf serum, Phosphate Buffer Saline (PBS), Collagenase, Buffer for conservation and transport of umbilical cords, Culture medium); Cell culture. - [Read Protocol for Primary Cultures of HUVECs]

Category: Primary Cell Isolation and Culture Protocols: Mammalian Cell Culture Protocols

Protocol for primary cultures of HUVECs. - [Read Protocol for Primary Cultures of HUVECs]

Category: Cell Culture Protocols: Cell Culture Contamination Prevention and Removal Protocols

Quality is important in all aspects of tissue culture since the quality of materials used i.e. media and other reagents) will affect the quality of the cultures and products derived from them. The main areas of quality control that are of concern for tissue culture are: The quality of the reagents and materials; The provenance and integrity of the cell lines; The avoidance of microbial contamination. - [Read Quality Control Considerations for Cell Culture]

Category: Fungi Protocols: Aspergillus Protocols

RAPD is a procedure for typing and fingerprinting isolates of a species. It can be used for epidemiological studies, such as investigations into hospital outbreaks and as a laboratory aid to keep track of cultures and to verify that mutants generated in the laboratory are genetically identical to the parental strain. In our hands, the use of one primer, R108, is sufficiently discriminatory to distinguish between the isolates of different strains. - [Read Random Amplification of Polymorphic DNA (RAPD) Typing and Fingerprinting Protocol]

Category: Viral Culture and Isolation Protocols: Viral Culture Protocols

This protocol is used to purify small amounts of recombinant DNAs cloned in robust strains of bacteriophage {lambda} such as {lambda}gt10, {lambda}gt11, {lambda}ZAP, or ZipLox. The DNAs are suitable for use as substrates for restriction enzymes and templates for DNA and RNA polymerases. - [Read Rapid Analysis of Bacteriophage {lambda} Isolates: Purification of {lambda} DNA from Liquid Cultures]

Category: Mouse Protocols: Mouse Cell Culture Protocols

Protocol for rat Chromaffin cells primary cultures: Standardization and quality assessment for single-cell assays. Includes: Preliminars; Isolation of the rat adrenal medulla; Enzymatic digestion of medullary tissue; Collecting and culturing the cells. - [Read Rat Chromaffin Cells Primary Cultures Protocol]

Category: Neuroscience Protocols: Neuronal Cell Culture Protocols: Rat Neuronal Cell Culture Protocols

Protocol for standardization of both the isolation procedure and the quality of the cultures. - [Read Rat Chromaffin Cells Primary Cultures Standardization and Quality Assessment for Single Cell Assays]

Category: Primary Cell Isolation and Culture Protocols: Mammalian Cell Culture Protocols

Protocol to be used as reference to help standardization of both the isolation procedure and the quality of the cultures allowing a better comparison of the results obtained from different laboratories. - [Read Rat Chromaffin Cells Primary Cultures: Standardization and Quality Assessment for Single-Cell Assay]

Category: Cell Culture Protocols: Cell Culture Contamination Prevention and Removal Protocols

This method is advantageous for saving the occasional cultures that become contaminated. Yeast contaminated cultures will appear cloudy when slightly shaken and lymphocytes will not cluster together as much as normal. If cultures are suspect, a drop of culture can be streaked on a YPD media plate to check for growth of yeast colonies, or a 5 ml sample can be taken to Barnes Diagnostic Center for identification of yeast strain. - [Read Removal of Yeast Contamination from Lymphoblast Cultures Protocol]

Category: Stem Cell Protocols: Stem Cell Culture Protocols

Protocol describes how to set up microdrop cultures to produce embryos which can then be used for making chimeras. The microdrop culture should be set up several hours to 1 day before the experiment to permit temperature and gas equilibration. - [Read Setting Up Microdrop Cultures Protocol]

Category: Tetrahymena Protozoa Protocols

A number of methods can be used for storage of unfrozen Tetrahymena cultures in the laboratory. Cells that are maintained using the short-term storage are described in this protocol. - [Read Short-Term Storage of Tetrahymena Cultures Protocol]

Category: Cell Culture Protocols: Sterile Technique Protocols

This unit on sterility in the tissue culture environment describes methods for sterilization of liquid and dry goods used for tissue culture and filtration of liquids to prevent contamination of cultures. - [Read Sterilization and Filtration Protocol]

Category: Bacterial Cell Culture Protocols: Bacterial Stocks Protocols

Protocol describes a method for storing bacterial cultures containing glycerol which are growing in liquid media. - [Read Storage of Bacterial Cultures Growing in Liquid Media Protocol]

Category: Bacterial Cell Culture Protocols: Bacterial Stocks Protocols

Protocol describes a method for storing bacterial cultures that are growing on solid media. It is useful for storing copies of cDNA. - [Read Storage of Bacterial Cultures Growing on Solid Medium Protocol]