crude Protocols

Category: Protein Protocols: Antibody Purification Protocols

Affinity purification of antibodies from crude serum. David Bowtell Lab. - [Read Affinity purification of antibodies from crude serum]

Category: Pharmacology and Toxicology Protocols: Enzyme Assays Protocols

Protocol provides a quick way to assay for RNA-dependent RNA polymerase (RdRP) activity in crude protein samples.  RdRP transcription products remain at the origin during paper chromatography. - [Read An Assay for RNA-Dependent RNA Polymerase Activity Protocol]

Category: Reporter Gene Assays: B-Galactosidase Assay Protocols

Method describes how a crude extract is prepared, and the activity is normalized to the amount of protein assayed. This method is particularly suitable for comparing cells that are grown under very different conditions or that have different genetic backgrounds. - [Read Assay of ß-Galactosidase in Yeast: Assay of Crude Extracts]

Category: Yeast Protocols: Yeast Genetics Protocols: B-Galactosidase Assay Protocols

Protocol describes how a crude extract is prepared, and the activity is normalized to the amount of protein assayed. This method is particularly suitable for comparing cells that are grown under very different conditions or that have different genetic backgrounds. - [Read Assay of ß-Galactosidase in Yeast: Assay of Crude Extracts Protocol]

Category: Reporter Gene Assays: B-Galactosidase Assay Protocols

There are two basic methods for the in vitro assay of B-galactosidase activity from yeast. They differ mainly in the method of preparing the material for assay. Both methods are described with accompanying protocols. Method I: Assay of Crude Extracts includes: Yeast Cell Growth; Yeast Cell Harvest; B-gal assays; Bradford Assays. Method II: Permeabilized cell assay. - [Read Assay of β-Galactosidase in Yeast Protocol]

Category: Yeast Protocols: Yeast Genetics Protocols: B-Galactosidase Assay Protocols

Protocol for assay of β-Galactosidase in Yeast. Includes: Assay of Crude Extracts; Yeast Cell Growth; Yeast Cell Harvest; β-gal assays; Bradford Assays; Permeabilized cell assay. - [Read Assay of β-Galactosidase in Yeast Protocol]

Category: Xenopus Protocols: Xenopus Egg Extracts Protocols

Protocol for crude depletion conditions for XKCM1. - [Read Crude Depletion Conditions for XKCM1 Protocol]

Category: Viral Culture and Isolation Protocols: Viral Culture Protocols

A crude lysate gel assay can be performed to roughly quantitate the DNA in lysates. This is often a valuable time saving step to determine if the phage yield is sufficient to warrant continuing the procedure. - [Read Gel Assay to Determine DNA Content of Phage Lysates Protocol]

Category: Pharmacology and Toxicology Protocols: Drug Discovery

To determine the selectivity of the inhibitors identified during screening efforts we developed gel-elongation assay using crude bacterial lysate directly to determine the target specificities of fatty acid synthesis inhibitors. - [Read Gel Elongation Assay for Type II Fatty Acid Synthesis Protocol]

Category: Lipid Protocols

New screening efforts and chemical modifications of existing compounds have been attempted to identify more selective and potent inhibitors. To determine the selectivity of the inhibitors identified during screening efforts we developed gel-elongation assay using crude bacterial lysate directly to determine the target specificities of fatty acid synthesis inhibitors. - [Read Gel-elongation Assay for Type II Fatty Acid Synthesis Protocol]

Category: Cell Organelle Protocols: Subcellular Fractionation Protocols: Mitochondria Isolation Protocols

A discontinuous gradient of iodixanol is used in which the crude mitochondrial fraction is layered beneath the preformed gradient. In this protocol the osmolality of the gradient is approx 600 mOsm and the crude mitochondrial fraction is loaded in 40% iodixanol rather than 50% iodixanol. - [Read Isolation of Yeast Mitochondria in aPre-Formed Iodixanol Gradient]

Category: Chromatography Protocols: Ion Exchange Chromatography Protocols

Protocol for the preparation of ion-exchange chromatography column.  Ion-exchange chromatography (IEC) can be used as a crude step in a protein purification scheme, or, with proper preparation, as a high-resolution step.  If high resolution is desired, considerable care should be taken during column preparation, choice of IEC media, and column packing. - [Read Preparation of an Ion-Exchange Column Protocol]

Category: Cell Organelle Protocols: Subcellular Fractionation Protocols

The employment of differential centrifugation to prepare crude fractions of subcellular particles from homogenates is often a necessary first step to a subsequent purification of one or more particles on a density gradient. This protocol describes the use of differential centrifugation to fractionate a mammalian liver homogenate but similar methods should be applicable to all mammalian tissues and cultured cells. - [Read Preparation of Crude Subcellular Fractions by Differential Centrifugation Protocol]

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

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]

Category: Chromatography Protocols: Immunoaffinity Chromatography Protocols

Protocol describes a method for removing antibodies that react with bacterially encoded proteins by passing a crude preparation of immunoglobulins through a column containing immobilized bacterial proteins. - [Read Removal of Cross-reactive Antibodies from Antiserum: Affinity Chromatography Protocol]

Category: Immunohistochemistry Protocols: Antigen Retrieval Protocols

Fixation can mask epitopes. However, it is often possible to re-expose them using a gentle incubation with proteases, which removes obstructing structures and allows antibody access, as described here. Many proteases can be used for this procedure, including very crude preparations of proteases, such as pronase. However, using a better-characterized protease, such as trypsin, allows a more controlled reaction and better comparison between experiments. - [Read Unmasking Hidden Epitopes with Proteases Protocol]

Category: Protein Protocols: Protein Quantitation Concentration Protocols

UV Absorbance 280 nm Protein Determination. Simple and quick method to accurately quantitate total protein in purified material or approximately quantitate total protein in crude lysates or partial purified material. Quantitation of the amount of protein in a solution is possible in a simple spectrometer.  Absorption of radiation in the near UV by proteins depends on the Tyr and Trp content (and to a very small extent on the amount of Phe and disulfide bonds).  Dr. Mario Lebendiker - [Read UV Absorbance 280 nm Protein Determination]