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(PI 3-Kinase) Activity Assay - http://www.upstate.com/misc/protocol_detail.q.prot.e.assay.a.name.e.Phosphatidyl_Inositol-3_Kinase_Assay_%28PI3%20Kinase%20Assay%29

Category: Signalling Signal Transduction Protocols

Protocol describing (PI 3-Kinase) activity assay. Includes Preparation of Phosphatidylinositol (PI). - [Read (PI 3-Kinase) Activity Assay]

A Sensitive ELISA-Based Assay for Glycosyltransferases - http://www.glycotech.com/protocols/Proto4.html

Category: Molecular Biology Protocols: Carbohydrate Protocols

The method allows the detection and quantification of glycosyltransferase activity using an ELISA-based procedure and carbohydrate-specific monoclonal antibodies. Avoids the use of radiolabeled substrates. Bruce A. Macher~Professor of Chemistry and Biochemistry, San Francisco State University, San Francisco, CA - [Read A Sensitive ELISA-Based Assay for Glycosyltransferases]

Activation of p70s6k and MAP Kinases: IP and Kinase Activity - http://www.whitelabs.org/Lab%20Protocols/kinase%20and%20phosphatase%20assays/ACTIVATION%20OF%20p70s6k%20and%20MAP%20KINASES.htm

Category: Signalling Signal Transduction Protocols: MAPK Protocols

Protocol describes the activation of MAP Kinase activity. Protocol contains information on: Buffers: ST, STE, Lysis Buffer Buffer A, Buffer B and 10x Kinase Buffer. - [Read Activation of p70s6k and MAP Kinases: IP and Kinase Activity]

Analysis of Mitochondrial Membrane Potential with the Sensitive Fluorescent Probe JC-1 - http://www.cyto.purdue.edu/flowcyt/research/cytotech/apopto/data/cossar1/cossariz.htm

Category: Cell Organelle Protocols: Mitochondria Protocols

The technique of JC-1 staining has been developed with the intent to detect DY in intact, viable cells. For this purpose JC-1 acts as a marker of mitochondrial activity, since the formation of J-aggregates, which give red emission, is reversible. Cells with high DY are those forming J-aggregates, thus showing high red fluorescence. On the other hand, cells with low DY are those in which JC-1 maintains (or re-acquire) monomeric form, thus showing only green fluorescence. - [Read Analysis of Mitochondrial Membrane Potential with the Sensitive Fluorescent Probe JC-1]

Analysis of protein phosphorylation: methods and strategies PDF - http://www.blackwell-synergy.com/doi/pdf/10.1111/j.1365-313X.2005.02613.x

Category: Protein Protocols: Protein Phosphorylation Protocols

Paper describing methods for monitoring kinase activity, investigating kinaseâ€“substrate specificity, examining phosphorylation in planta and the determination of phosphorylation sites in a protein. In addition, strategic considerations for experimental design and variables will be discussed. Scott C. Peck, the Plant Journal. - [Read Analysis of protein phosphorylation: methods and strategies PDF]

Angiotensin assay protocol - http://pingu.salk.edu/~sefton/Hyper_protocols/angio.html

Category: Signalling Signal Transduction Protocols: Protein Kinase Protocols

Angiotensin assay protocol. Bart's Cookbook. Assay activity of Lck kinase expressed in a retroviral vector in rat fibroblasts. - [Read Angiotensin assay protocol]

Assay for Immunoprecipitated Phosphoinositide 3-Kinase (PI 3 Kinase) Activity (in vitro) - http://www.upstate.com/misc/protocols.q.prot.e.assay/Assay+for+Immunoprecipitated+Phosphoinositide+3+Kinase++PI+3+Kinase++Activity+%3Ci%3E+in+vitro+%3C%2Fi%3E

Category: Signalling Signal Transduction Protocols: Protein Kinase Protocols

Immunoprecipitation assay for Phosphoinositide 3-Kinase (PI 3 Kinase) Activity (in vitro) Protocol. Upstate. - [Read Assay for Immunoprecipitated Phosphoinositide 3-Kinase (PI 3 Kinase) Activity (in vitro)]

Assay of ß-Galactosidase in Yeast: Assay of Crude Extracts - http://www.cshprotocols.org/cgi/content/extract/2006/1/pdb.prot4157

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]

Assay of ß-Galactosidase in Yeast: Assay of Crude Extracts Protocol - http://www.cshprotocols.org/cgi/content/extract/2006/1/pdb.prot4157

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]

Assay of ß-Galactosidase in Yeast: Permeabilized Cell Assay - http://www.cshprotocols.org/cgi/content/extract/2006/1/pdb.prot4158

Category: Reporter Gene Assays: B-Galactosidase Assay Protocols

In the method described here, the cells are permeabilized to allow the substrate to enter the cells and the activity is normalized to the number of cells assayed. - [Read Assay of ß-Galactosidase in Yeast: Permeabilized Cell Assay]

Assay of ß-Galactosidase in Yeast: Permeabilized Cell Assay Protocol - http://www.cshprotocols.org/cgi/content/extract/2006/1/pdb.prot4158

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

In this protocol, the cells are permeabilized to allow the substrate to enter the cells and the activity is normalized to the number of cells assayed. - [Read Assay of ß-Galactosidase in Yeast: Permeabilized Cell Assay Protocol]

Assay of β-Galactosidase in Yeast Protocol - http://www.oardc.ohio-state.edu/stockingerlab/Protocols/BetaGalAssays.pdf

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]

Assay:Single Round of In Vitro Transcription from Assembled Chromatin Templates Using a HeLa Cell Ex - http://www.bio.com/protocolstools/protocol.jhtml%3Bjsessionid%3D3APITJJIWFIM1R3FQLMCFEWHUWBNSIV0?id=p9063

Category: Cell Biology and Cell Culture: In Vitro Reconstitution Protocols

This protocol describes an in vitro transcription assay that allows for a single round of transcription from in vitro assembled chromatin. Comparing the activity of a receptor or transcriptional coactivator in an assay that measures only a single round of transcription with the results from multiple rounds of transcription can help elucidate the mechanism of transcriptional activation by those factors. - [Read Assay:Single Round of In Vitro Transcription from Assembled Chromatin Templates Using a HeLa Cell Ex]

CaspaTag Caspase Activity Protocol - http://www.niehs.nih.gov/research/atniehs/core/fc/protocols/caspatag.cfm

Category: Cell Biology and Cell Culture: Flow Cytometry Protocols

This assay is based on carboxyfluorescein labeled fluoromethyl ketone (FMK)-peptide inhibitors of caspases. Includes: Working Dilution of FMK-peptide inhibitors; 1X Working Dilution Wash Buffer; Protocol for Flow Cytometry. - [Read CaspaTag Caspase Activity Protocol]

Chambers for Examination of Live Cells under Mechanical Stress Protocol - http://www.cshprotocols.org/cgi/content/extract/2007/3/pdb.ip32

Category: Microscopy Protocols: Live-Cell Imaging Protocols

Manual measurement and manipulation of the cell surface requires access to the cells, usually in an open chamber. Temperature-controlled chambers or stage inserts are preferred for maintaining physiological activity during the experiment. For example, heated culture dishes with coverslip glass bottoms (Bioptechs) permit high-resolution fluorescence microscopy of living cells during force application. - [Read Chambers for Examination of Live Cells under Mechanical Stress Protocol]

Chemotaxis Assay - http://www.cbrinstitute.org/labs/springer/protocols/melissa_chemotaxis.html

Category: Immunology: Chemotaxis

Chemotaxis Assay, Springer Lab. A chemotaxis assay's function is to assess whether a factor or molecule of interest has chemotactic activity on a motile cell type. Chemotaxis is the ability of a factor to cause the migration of a cell. The chemotactic assay is based on the creation of a chemical gradient of the chemotactic agent which will cause cells to migrate through the gradient towards the chemotactic agent. - [Read Chemotaxis Assay]

Chemotaxis Assay Protocol - http://www.cbrinstitute.org/labs/springer/protocols/melissa_chemotaxis.html

Category: Cell Biology and Cell Culture

This chemotaxis assay protocol is based on the premise of creating a gradient of the chemotactic agent and allowing cells to migrate through a membrane towards the chemotactic agent. A chemotaxis assay can determine whether your protein or small molecule of interest has chemotactic activity on a specific cell type. Chemotaxis is then the ability of a protein to direct the migration of a specific cell. - [Read Chemotaxis Assay Protocol]

ELISA Method to Measure Inhibition of the COX Enzymes Protocol - http://www.natureprotocols.com/2006/11/22/an_elisa_method_to_measure_inh.php

Category: ELISA Protocols

The cyclooxygenase (COX) reaction can be monitored by measurement of oxygen consumption, peroxidase co-substrate oxidation or prostaglandin (PG) detection. This protocol describes a procedure measuring cyclooxygenase activity by quantifying PGE2 produced by enzymatic conversion of arachidonic acid, in the presence or absence of potential inhibitors. - [Read ELISA Method to Measure Inhibition of the COX Enzymes Protocol]

Factors that Influence Restriction Enzyme Digestion Activity - http://arbl.cvmbs.colostate.edu/hbooks/genetics/biotech/enzymes/cuteffects.html

Category: Molecular Biology Protocols: Restriction Enzyme Digestion

Factors that Influence Restriction Enzyme Digestion Activity. Buffer Composition, Incubation Temperature, DNA Methylation, Star Activity, Multiple Enzymes. Laura Austgen PhD et. al, Biomedical Hypertextbook, Colorado State Univ. - [Read Factors that Influence Restriction Enzyme Digestion Activity]

FAK Autophosphorylation Assay - http://www.bio.com/protocolstools/protocol.jhtml?id=p1984

Category: Signalling Signal Transduction Protocols

This kinase assay is meant to determine whether an agonist or event can influence the autophosphorylation of FAK. The addition of 1 Î¼l of polyGT to the kinase reaction mix will determine the activity of the enzyme against a substrate. Includes information on: Harvest, Immunoprecipitation, Kinase Reaction and Antibody Detection of FAK. - [Read FAK Autophosphorylation Assay]

Gel Mobility Shift Assay in PDF format - http://www.biochem.northwestern.edu/ibis/morimoto/Protocols/III.%20Proteins/C.%20DNA-Protein%20Interactions/3a.%20GMSA.pdf

Category: DNA Protocols: EMSA DNA-Protein Protocols

This protocol works well for HSF DNA-binding activity experiments. - [Read Gel Mobility Shift Assay in PDF format]

Hamster Ovary Cell NA+/K+ -ATPase Test - http://embryo.ib.amwaw.edu.pl/invittox/prot/35.htm

Category: Pharmacology and Toxicology Protocols: Cytotoxicity Protocols: Cell Specific Cytotoxicity Assays Protocols

Accumulation of lipophilic substances in the plasma membrane may affect the membrane lipid order and consequently affect the function of these proteins. Changes in the activity of the Na+/K+ -ATPase, which is the major active transport system responsible for the electrochemical potential in mammalian cells, can therefore be an indication of the effect that a chemical may have on the viability of the cell membrane and possibly the whole cell. - [Read Hamster Ovary Cell NA+/K+ -ATPase Test]

Histone H1 Kinase Activity Assay - http://www.bio.com/protocolstools/protocol.jhtml?id=p910

Category: Signalling Signal Transduction Protocols

This protocol describes assaying kinase activity of a putative kinase using Histone H1 as the substrate. Histone H1 is the canonical kinase substrate in this type of assay. Phosphorylation of Histone H1 is assessed by SDS-Polyacrylamide gel electrophoresis followed by autoradiography. Includes information: H1 Kinase Assay on Individual Xenopus Oocytes; H1 Kinase Assay on Xenopus Egg Extract Samples; H1 Kinase Assay on Tissue Culture Cells; Helpful protocol hints. - [Read Histone H1 Kinase Activity Assay]

Human Lymphocyte Cytotoxicity Assay Protocol - http://embryo.ib.amwaw.edu.pl/invittox/prot/6.htm

Category: Pharmacology and Toxicology Protocols: Cytotoxicity Protocols: Cell Specific Cytotoxicity Assays Protocols

This method measures the leakage of DNA and lactate dehydrogenase from lymphocytes into the surrounding medium as an indicator of cytotoxicity. This method also includes an assay of intracellular (mitochondrial) diaphorase as a measure of cellular activity (MTT assay). - [Read Human Lymphocyte Cytotoxicity Assay Protocol]

Immunocytochemistry in Free-Floating Sections Protocol - http://www.fisher.co.uk/techzone/life/table-pdfs/protocol/immunocytochemistry_netwells_protocol.pdf

Category: Immunohistochemistry Protocols: Antibody Staining Protocols

There are several strategies to visualize the antibody. For transmitted light microscopy, color development substrates for enzymes are often used. The antibody can be directly labeled with the enzyme. However, such a covalent link between an antibody and an enzyme might result in a loss of both enzyme and antibody activity. For these reasons several multistep staining procedures have been developed, where intermediate link antibodies are used. In this protocol use the Vectastain ABC-kit. - [Read Immunocytochemistry in Free-Floating Sections Protocol]

Articles (1-4 of 4)

In Vitro Translated Xenopus Mos Kinase Assay Protocol

In Vitro Translated Xenopus Mos Kinase Assay Protocol. In response to progesterone, immature Xenopus oocytes mature to eggs that can be fertilized. The Mos protein kinase is essential for oocyte maturation, most likely due to its ability to activate the MAP kinase cascade. This MAP kinase cascade eventually leads to the activation of Cdc2/cyclin B and entry into M phase. In this protocol, tagged Mos kinase is translated in vitro, immunopurified, and used in a kinase assay.

DNA Ligation Protocol

The DNA Ligation protocol described here contains the steps required to join together using ligase enzyme both plasmid DNA and insert DNA fragments in order to create a new plasmid. This new ligated plasmid can be transformed after into competent bacteria to produce DNA for mini, midi or maxi-prep isolation.

3' Rapid Amplification of cDNA Ends RACE Using PCR Protocol

3' Rapid Amplification of cDNA Ends RACE Using PCR Protocol. This protocol contains the steps for 3' end rapid amplification of mRNA by PCR. The first-strand cDNA is synthesized from total or poly(A+) RNA by priming from the poly-A tail of the mRNA using a oligo (dT) adaptor primer. The cDNA is then amplified via PCR using a gene-specific primer and an adaptor primer.

Histone H1 Kinase Activity Assay

Histone H1 Kinase Activity Assay Protocol. This protocol describes assaying kinase activity of a putative kinase using Histone H1 as the substrate. Histone H1 is the canonical kinase substrate in this type of assay. Phosphorylation of Histone H1 is assessed by SDS-Polyacrylamide gel electrophoresis followed by autoradiography.

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