DNA Plasmid Preps Protocols

Protocol for CsCl prep of plasmid DNA. This is a standard large scale prep.  For plasmid DNA which gives a yield of 0.5 1.0 mg. - [Read CsCl Prep of Plasmid DNA Protocol]

Protocol for DNA plasmid prep. - [Read DNA Plasmid Prep. Protocol]

Protocol for DNA preparation, plasmid DNA using alkaline method. - [Read DNA Preparation, Plasmid DNA Alkaline Method Protocol]

Protocol for mini-prep. Includes: PREPARATION OF E. COLI; PRODUCTION OF CLEAR LYSATE; cDNA ISOLATION. - [Read Mini-Prep Protocol]

Protocol for plasmid midi-prep from bacteria. - [Read Plasmid Midi-Prep from Bacteria Protocol]

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]

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]

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]

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]

Large (>15 kb), closed circular plasmids are prepared (albeit inefficiently and in small yield) by lysing bacteria with SDS. - [Read Preparation of Plasmid DNA by Lysis with SDS Protocol]

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]

Plasmid DNA is prepared directly from bacterial colonies plucked from the surface of agar media with toothpicks. - [Read Preparation of Plasmid DNA: Toothpick Minipreparation Protocol]

A solution containing plasmid DNA, saturating amounts of ethidium bromide, and CsCl (44% w/v) is layered between two solutions of lesser (35% w/v CsCl) and greater density (59% w/v CsCl).  During centrifugation to equilibrium, the closed circular plasmid DNA and linear DNAs form bands at different densities. - [Read Purification of Closed Circular DNA by Equilibrium Centrifugation in CsCl-Ethidium Bromide Gradient]

Solutions containing plasmid DNA are adjusted to a density of 1.55 g/ml with solid CsCl.  The intercalating dye, ethidium bromide, which binds differentially to closed circular and linear DNAs, is then added to a concentration of 200 mu;g/ml.  During centrifugation to equilibrium, the closed circular DNA and linear DNAs form bands at different densities. - [Read Purification of Closed Circular DNA by Equilibrium Centrifugation in CsCl-Ethidium Bromide Gradients]

Protocol for purification of plasmid DNA by chromatography. - [Read Purification of Plasmid DNA by Chromatography Protocol]

Crude preparations of plasmid DNA are first treated with lithium chloride and Rnase (to remove RNA).  The plasmid DNA is then precipitated in a solution containing polyethylene glycol and MgCl2. - [Read Purification of Plasmid DNA by Precipitation with Polyethylene Glycol Protocol]

Protocol for quick DNA plasmid prep. Protocol gives very clean plasmid preps for restriction digests and cloning.  However, due to the alkaline lysis step, the DNA is often nicked and may not give exceptional sequence data. - [Read Quick DNA Plasmid Prep Protocol]

Protocol for quick DNA plasmid prep. This is a very fast mini-prep protocol which is suitable for sequence analysis and restriction digests. - [Read Quick DNA Plasmid Prep. Protocol]

Contamination of plasmid DNA by fragments of DNA and RNA is reduced to an acceptable level by centrifugation through 1 M sodium chloride.  This method was devised by Brian Seed when he was a graduate student at Harvard University. - [Read Removal of Small Fragments of Nucleic Acid from Preparations of Plasmid DNA by Centrifugation]

High-molecular-weight RNA and proteins can be precipitated from preparations of plasmid DNA by high concentrations of LiCl and removed by low-speed centrifugation. - [Read Removal of Small Fragments of Nucleic Acid from Preparations of Plasmid DNA by Precipitation with Li]