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19229 results for Assays

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Assays

An assay is an investigative procedure in laboratory medicine, pharmacology, environmental biology, and molecular biology for qualitatively assessing or quantitatively measuring the presence or functional activity of the analyte, or the entity being targeted by the assay. Generally, assays involve biological materials or phenomena which tend to be intrinsically more complex in composition or in behavior than what can be handled by traditional chemical analysis and titration.

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Protein quantitation assay kits, CB-X™ Protein assay

Protein quantitation assay kits, CB-X™ Protein assay

Supplier: G-Biosciences

CB-X™ Protein Assay is a Coomassie dye based protein assay based on the Bradford Protein Assay. For protein samples in simple, uncomplicated aqueous buffers CB-X™ is a highly sensitive, single reagent assay that can be performed in 5 minutes. For complicated protein samples, CB-X™ Protein Assay is supplied with reagents to clean up the samples and remove all reagents and chemicals that interfere with accurate protein estimation in a single step. These reagents include detergents, chaotropes, reducing agents, alkylating agents, sugars, high salt concentrations, buffering agents and chelating agents. The clean up stage and subsequent protein assay is performed in a single tube to ensure no protein loss and to maintain the accuracy of the assay.

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Triglyceride colorimetric assay kit

Supplier: Cayman Chemical

Triglyceride Colorimetric Assay Kit is a simple, reproducible and sensitive tool for assaying triglycerides in plasma, serum, cell lysates and tissue homogenate samples.

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Cell-based assay calcein AM

Supplier: Cayman Chemical

Cellular assay, Cell-based assay calcein AM

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Phagocytosis assay kit (IgG FITC)

Supplier: Cayman Chemical

Phagocytosis Assay Kit (IgG FITC) for the identification of factors regulating the phagocytic process in vitro.

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Thiol Detection Assay Kits

Thiol Detection Assay Kits

Supplier: Cayman Chemical

A simple, reproducible, and sensitive tool for assaying free thiol content in samples.

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Cell viability assay kits

Supplier: Biotium

MTT, XTT, and resazurin are reduced by mitochondrial metabolic activity to yield coloured or fluorescent products, and thus are useful for and assaying cell viability and quantitating cell number. MTT and XTT are reduced to coloured formazin salts that can be measured by absorbance. MTT generates an insoluble formazin salt, requiring cell lysis before the absorbance can be measured, while XTT does not require cell lysis for measurement. Resazurin is a non-fluorescent blue dye that is reduced to the pink fluorescent compound resorufin, which can be measured by fluorescence or absorbance.

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p53 transcription factor assay kit

p53 transcription factor assay kit

Supplier: Cayman Chemical

96-Well assay for measurement of p53.

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Caspase-3 cell assay kit

Supplier: Enzo Life Sciences

This kit is a complete assay system for measuring caspase-3 and caspase-3-like activity (DEVDase) in cellular extracts.

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Fluorescent protease assay, Fluoro™

Fluorescent protease assay, Fluoro™

Supplier: G-Biosciences

The Fluoro™ Protease Assay Kit is designed for the quantitative determination of proteases present in a protein sample. The assay uses fluorescein isothiocyanate (FITC)-labelled casein as a general protease substrate. The fluorescein label on the FITC-casein is highly quenched. When the proteases present in the sample of interest digest the FITC-casein substrate into smaller peptides, the quenching of the fluorescence label is relieved and the fluorescence of the substrate is increased. The fluorescence of the FITC-labeled peptide is measured with excitation at 485 nm and emission at 530 nm to determine protease activity. The kit detects picogram level of proteases present in the sample.

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Neutrophil/Monocyte Respiratory Burst Assay Kit

Neutrophil/Monocyte Respiratory Burst Assay Kit

Supplier: Cayman Chemical

Neutrophil/Monocyte Respiratory Burst Assay Kit provides PMA, dihydrorhodamine 123, and additional reagents necessary for inducing and quantifying a respiratory burst response in neutrophils and monocytes by flow cytometry. The assay can be performed on whole blood or on cells in various types of cell culture media. Because the assay reagents are not species-specific, this assay can be used in any species or cell type capable of producing a NADPH oxidase-dependent respiratory burst response.

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PPARδ transcription factor assay kit

PPARδ transcription factor assay kit

Supplier: Cayman Chemical

A 96-well assay for measurement of PPARδ DNA binding activity.

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TUNEL assay kits

TUNEL assay kits

Supplier: Biotium

TUNEL (terminal deoxynucleotidyl transferase (TdT) mediated dUTP nick-end labeling) is highly selective for the detection of apoptotic cells, but not necrotic cells or cells with DNA strand breaks resulting from irradiation or drug treatment. In this assay, TdT enzyme catalyses the addition of labeled dUTP to the 3’ ends of cleaved DNA fragments. Fluorescent dye-conjugated dUTP can be used for direct detection of fragmented DNA by fluorescence microscopy or flow cytometry.

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Protease assay kit

Protease assay kit

Supplier: G-Biosciences

This Protease Assay Kit is designed for the quantitative determination of proteases present in protein sample, using a dye-labelled protein substrate. The proteases present in the sample of interest will digest the protein substrate and release dye labelled peptides. The absorbance of the dye-labelled peptide is measured at 570 nm for determination of protease activity.

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Protein quantitation assay kits, Non-Interfering™ (NI™) Protein Assay

Protein quantitation assay kits, Non-Interfering™ (NI™) Protein Assay

Supplier: G-Biosciences

A highly sensitive colorimetric protein assay that overcomes interference of common laboratory agents present in protein solutions and shows minimal protein-to-protein variation. The assay is unaffected by the presence of common laboratory agents such as reducing agents, chelating agents, detergents, amines, sugars, chaotropes, salts, drugs, antibiotics, cobalt, and others.

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Cellular senescence live cell analysis assay

Supplier: Enzo Life Sciences

Simple assay to quantify senescence-associated β-galactosidase activity, in live cells, using flow cytometry or fluorescent microscopy.

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Calcium assay kit, FluoForte®

Calcium assay kit, FluoForte®

Supplier: Enzo Life Sciences

FluoForte® Calcium Assay Kits detect mobilisation of intracellular calcium utilising a fluorogenic calcium-binding dye optimised for superior cell-permeability and retention. The self-quenching dye undergoes an electronic change upon binding of calcium, resulting in a several order of magnitude greater fluorescence.

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DPPIV/CD26 assay kit for biological samples

Supplier: Enzo Life Sciences

The DPPIV/CD26 Assay kit for biological samples is a complete assay system designed to measure DPPIV activity in biological fluids such as plasma, serum, urine, and saliva. Uses for the kit include correlation of DPPIV activity with disease states or determination of the efficacy of DPPIV inhibitors administered in vivo.

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ATP-Glo™ Bioluminometric cell viability assay

ATP-Glo™ Bioluminometric cell viability assay

Supplier: Biotium

ATP-Glo™ Bioluminometric Cell Viability Assay offers a highly sensitive assay for quantifying ATP. The homogeneous assay involves a single addition of ATP-Glo™ Detection Cocktail directly to cells in culture medium.

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Proteasome 20S Assay Kit

Supplier: Enzo Life Sciences

A QuantiZyme™ Assay System. Fluorogenic, non-radioactive assay designed to measure chymotrypsin-like protease activity of purified 20S proteasome. This 96-well assay is useful for screening inhibitors and modulators of the 20S proteasome.

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GFP-CERTIFIED® FLUOFORTE® Calcium assay kit

Supplier: Enzo Life Sciences

The GFP-Certified™ FluoForte™ Calcium Assay kit provides a homogeneous fluorescence-based assay for detecting intracellular calcium mobilization across a broad spectrum of biological targets.

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ApoSENSOR™ ADP/ATP ratio assay kit

Supplier: Enzo Life Sciences

The assay is designed to detect ADP/ATP ratio. The changes in ADP/ATP ratios have been used to conveniently differentiate apoptosis from necrosis.

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Glucose Uptake Cell-Based Assay Kit

Glucose Uptake Cell-Based Assay Kit

Supplier: Cayman Chemical

A cell-based assay for studying modulators of cellular glucose uptake.

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ProteoStat™ PDI assay kit

Supplier: Enzo Life Sciences

The PROTEOSTAT® PDI assay kit provides a simple, homogenous assay for screening modulators of PDI enzymatic activity. This is accomplished by monitoring PDI-catalyzed reduction of insulin in the presence of Dithiothreitol (DTT), resulting in the formation of insulin aggregates which then bind avidly to the red-emitting fluorogenic PROTEOSTAT® PDI detection dye.

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HAT activity assay kit

Supplier: Enzo Life Sciences

Histone acetyltransferases (HATs) have been implicated to play a crucial role in various cellular functions, such as gene transcription, differentiation, and proliferation. HAT Activity Colorimetric Assay Kit offers a convenient, nonradioactive system for a rapid and sensitive detection of HAT activity in mammalian samples.

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OXI-TEK TBARS assay kit

OXI-TEK TBARS assay kit

Supplier: Enzo Life Sciences

The sensitivity of measuring thiobarbituric acid reactive substances (TBARS) has made this assay the method of choice for screening and monitoring lipid peroxidation, which is a major indication of oxidative stress.

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Compatible Lowry protein assay

Supplier: G-Biosciences

These CL (Compatible Lowry) Protein Assay is based on the widely cited protein assay by Lowry et. al. (1951). The CL Protein Assay improves upon the traditional Lowry method to be compatible with common laboratory agents known to interfere with Lowry protein assays such as reducing agents (dithiothreitol (DTT), ß-mercaptoethanol and TCEP), detergents, chelating agents, amines, sugars, strong chaotropic buffers, salts, drugs, antibiotics, cobalt and other common laboratory agents.

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Red hydrogen peroxide assay kit

Supplier: Enzo Life Sciences

Red Hydrogen Peroxide Assay Kit provides a simple absorbance-based or fluorometric assay to detect and quantify hydrogen peroxide or peroxidase activity in biochemical assays, cell extracts and in live cells. It can also be used to detect a variety of oxidase activities through enzyme-coupled reactions. The kit is an optimized ‘mix and read’ assay that is suitable for both 96- and 348-well formats and is compatible with HTS liquid handling.

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Uric acid assay kit

Uric acid assay kit

Supplier: Cayman Chemical

Uric Acid Assay Kit is used to measure uric acid in serum, plasma and urine.

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Calcineurin phosphatase assay kit

Supplier: Enzo Life Sciences

This colorimetric kit is designed for inhibitor screening or kinetic assay of recombinant Calcineurin. Activity is determined using the RII phosphopeptide substrate, the most efficient and selective peptide known for calcineurin, and detection of free phosphate released is based on the classic malachite green assay.

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Oct4 transcription factor assay kit

Oct4 transcription factor assay kit

Supplier: Cayman Chemical

96-Well assay for measurement of Oct4.

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