Shop All Immunoassay Buffers & Reagents

Assay Buffer (5X) (Invitrogen™)

Assay Buffer (5x) for Antibody Pairs is intended to be used as a:(1) blocking reagent for ELISA plates(2) diluent for ELISA standards and samples(3) diluent for the detection antibody(4) diluent for the HRP conjugate

Application: Antibody pairs (ELISA)

Human/Monkey Extracellular Protein Buffer Magnetic Reagent Kit (Invitrogen™)

This Human/Monkey Extracellular Protein Buffer Reagent Kit is comprised of the reagents that are intended for use with Human and Monkey extracellular magnetic singleplex kits for in vitro quantitative determination of analytes in serum, plasma, and tissue culture supernatant. Singleplex magnetic bead kits maximize flexibility in experimental design, permitting the measurement of one or multiple analytes in panels designed by the researcher. These reagents are suitable for use with the Luminex® 200™, FLEXMAP 3D®, and MAGPIX® systems.

Luminex® xMAP® Technology—Effective and Proven Analytical Tool
Human and Monkey extracellular magnetic singleplex kits are based on xMAP® technology. The use of a suspension bead-based technology enables the multiplexing capabilities of the Luminex® assays. Magnetic microspheres are internally dyed with red and infrared fluorophores of differing intensities. Each bead is given a unique number, or bead region, allowing differentiation of one bead from another. Beads covalently bound to different antibodies can be mixed in the same assay, utilizing a 96-well microplate format. At the completion of the sandwich immunoassay, beads can be read using the Luminex® 200™ or FLEXMAP 3D® detection systems, instruments based on flow cytometry, two lasers, real-time digital signal processing, and xPONENT® software to distinguish bead color (analyte) and assay signal strength (PE) fluorescence intensity.

MAGPIX® System—Brings the Power of Multiplex to Every Lab
The MAGPIX® system may also be used for sample analysis. This instrument utilizes xMAP® technology and is built on light-emitting diodes (LEDs) for excitation, a CCD camera for bead and analyte detection and high-speed digital signal processors. The MAGPIX® system is more compact and robust, providing a very cost effective magnetic bead-based multiplexing tool. Simple, out of the box set-up allows researchers to rapidly perform singleplex or multiplex assays of up to 50 targets in single biological samples. The MAGPIX® system is easy to use—ideal for both new and experienced users alike.

Magnetic Beads Let You Do More with Your Time
Magnetic bead-based assays use Luminex® MagPlex magnetic microsphere. All other assay components are the same as the equivalent Luminex® polystyrene bead-based assays providing identical quality and consistency performance. MagPlex technology takes advantage of magnetic properties to simplify assay wash steps and maximize uniformity of results. Magnetic bead-based assays also enable automation, decrease hands-on time, and increase throughput and precision. Easy to use protocols allow you to get your results in as little as 3.5 hours. In addition, these assays are compatible with both vacuum and magnetic wash stations and work well with the MAGPIX® system as well as other Luminex® xMAP® platforms.

More Validation for Confidence in Your Results
Human and Monkey extracellular magnetic singleplex kits have been validated using the same rigorous criteria that distinguish Luminex® assays from other commercially available assays. With more than 20 years of experience, our fully qualified antibodies help ensure the specificity and sensitivity of our assays. Every singleplex kit and premixed multiplex kit comes with a product insert that outlines the specifications for each marker in the assay (see Documents section below).

Learn more about the complete Luminex® product line.

For Research Use Only. Not intended for any animal or human therapeutic or diagnostic use.

Peroxidase Suppressor (Thermo Scientific™)

Thermo Scientific Pierce Peroxidase Suppressor is a stable, easy-to-use inhibitor of endogenous peroxidase activity from cells and tissues to reduce background signal in HRP-based immunohistochemistry applications.

Features of Peroxidase Suppressor:

• Stable
• One component
• Ready-to-use
• Effectively inhibits peroxidase activity without interfering with antigen-antibody
interactions

This peroxidase suppressor is optimized for immunohistochemical applications. The Peroxidase Suppressor is a stable, easy-to-use inhibitor of endogenous peroxidase activity. This proprietary formulation is the most effective peroxidase inhibitor available. The immunoperoxidase method is a commonly used detection method for immunostaining of cells and tissues. However, the analysis often is complicated by the presence of endogenous peroxidase and "pseudoperoxidase" activity in the cells and tissues. This presence results in nonspecific staining when a substrate such as diaminobenzidine (DAB) is present. Nonspecific staining is difficult to distinguish from the immunochemical marker, making it difficult to distinguish the final location of the antigen of interest. The typical method of inhibiting endogenous peroxidase activity involves hydrogen peroxide or hydrogen peroxide in methanol. The peroxidase suppressor inhibits peroxidase activity even more effectively than the method using hydrogen peroxide in methanol. Plus, the Peroxidase Suppressor does not affect antibody activity (see figure). Peroxidase Suppressor also can be used on blots of whole cell supernatant prior to the addition of the horseradish peroxidase (HRP) marker.

SuperBlock™ (TBS) Blocking Buffer (Thermo Scientific™)

SuperBlock Blocking Buffer is an optimized solution containing a single purified glycoprotein that provides incredibly fast and effective blocking for ELISA, IHC, and western blot analysis.

Compare and view all available blocking buffers

Features of SuperBlock Blocking Buffer:
Blocking time—block membranes in 5 to 10 minutes and ELISA plates in 2 minutes
Applications—ELISA, western blotting, IHC; biotin-free for use with streptavidin system
Stability—store buffer at 4°C for one year; store blocked plates dry for up to 12 months

Blocking micro-plates, membranes or tissues with a SuperBlock Buffer yields a high signal-to-noise ratio in most detection systems. The protein-based formulation does not contain any immunoglobulins, albumin, or endogenous biotin, making it compatible in many situations where traditional blocking agents fail. The buffer is especially effective at blocking coated polystyrene microplates (96-well plates) and stabilizing them for drying and storage for later use.

Related products
SuperBlock (PBS) Blocking Buffer
SuperBlock T20 (PBS) Blocking Buffer
SuperBlock T20 (TBS) Blocking Buffer
SuperBlock (TBS) Blocking Buffer Dry Blend

Pierce™ Protein-Free T20 (TBS) Blocking Buffer (Thermo Scientific™)

Pierce Protein-Free Blocking Buffer is a non-protein compound that provides effective blocking for membrane-based and plate-based protein detection methods, resulting in extremely low background. It is supplied in a ready-to-use format.

Compare and view all available blocking buffers

Features of Protein-Free Blocking Buffer:
Protein-free blocker—minimizes or eliminates cross-reactivity associated with protein-based blocking buffers
Applications—western blotting (membranes), ELISA (microplates), and arrays (coated glass slides)
Streptavidin-friendly—free of biotin; no interference with avidin-biotin detection systems
High-performance—optimized and validated in many protein methods to provide high signal-to-noise ratio (i.e., no quenching of specific binding and signal but eliminating nonspecific binding and background)

Traditional blocking buffers contain proteins that can cross-react in certain immunodetection systems, resulting in high background and reduced signal. Pierce Protein-Free Blocking Buffers are devoid of protein while remaining highly effective at blocking plates, membranes, and other surfaces for ELISA, western blotting, glass slide arrays, and other applications.

Related products
Pierce Protein-Free (PBS) Blocking Buffer
Pierce Protein-Free T20 (PBS) Blocking Buffer
Pierce Protein-Free (TBS) Blocking Buffer

Buffer Kit for Antibody Pairs (Invitrogen™)

This Buffer Kit for Antibody Pairs is for use with Invitrogen Antibody Pairs. This Kit provides sufficient materials for 10 ELISA plates.

Pierce™ Stable Peroxide Substrate Buffer (10X) (Thermo Scientific™)

Thermo Scientific Pierce Stable Peroxide Substrate Buffer (10X) include optimized, reliable and convenient stock solutions of peroxide for HRP-based assays detection.

Features of Stable Peroxide Substrate Buffer (10X):

• Ready-to-use
• Minimize assay-to-assay variability

Buffered stable hydrogen peroxide (H2O2) is used by researchers who prefer to make their own HRP-ELISA substrates. This is easily done by adding a chromogen of choice to the buffer. Stable Peroxide Substrate Buffer has a long shelf life (12 months after receipt) and is provided as a 10-fold concentrate. A total volume of 1000 mL can be made from one 100 mL bottle of concentrate. If you use 10 mL of substrate per plate, this will allow you to make substrate for 100 plates from only one bottle of Stable Peroxide Substrate Buffer.

Related Products
Pierce™ Diethanolamine Substrate Buffer (5X)

Pierce™ Peroxidase Conjugate Stabilizer (Thermo Scientific™)

Thermo Scientific Pierce Peroxidase Conjugate Stabilizer is an antifreeze solution for storing freezer aliquots and stocks of antibodies and other HRP-conjugates in liquid form so they can be pipetted for use without thawing.

Features of Peroxidase Conjugate Stabilizer:

• Provides a buffered anti-freeze environment for enzyme conjugated antibodies and proteins
• Contains high-purity ethylene glycol, which maintains a liquid, low viscosity solution at -20°C
• Contains preservatives to prevent anti-microbial growth during long-term storage
• No aliquoting of conjugate is necessary and sampling is convenient

Pierce Peroxidase Conjugate Stabilizer is a storage solution for peroxidase-conjugated antibodies, streptavidin and other proteins (HRP conjugates). Mixing the Stabilizer in 2:1 or 1:1 ratio with HRP conjugate solutions (usually at least 1 mg/mL) produces a stabilized conjugate stock solution that remains a liquid at -20°C. This allows the conjugate to be pipetted directly from the sub-zero temperature condition, eliminating damaging freeze-thaw cycles. The highly purified solution is free of oxidizing agents and other contaminants that can harm enzyme activity, ensuring that stock solutions can be stored for months without significant loss of activity.

HRP-Conjugate Diluent/Stabilizer (Invitrogen™)

This product may be used as a conjugate diluent in enzyme immunoassays.

Blocker™ Casein in PBS (Thermo Scientific™)

Blocker Casein is a ready-to-use solution of purified casein for blocking steps in western blot, ELISA, IHC, and nucleic acid detection methods. Blocker Casein is 1% (w/v) casein, which corresponds to the optimal concentration for most applications.

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Features:
Purified casein—single-protein blocking buffer provides fewer chances of cross-reaction with assay components than serum or milk solutions
Easy to use—1% casein solution is ready to use; can be diluted further as needed
Safe—stable, thimerosal-free formulation

Related products
Blocker Casein in TBS

Normal Goat Serum Control (Invitrogen™)

Normal Goat Serum Control for IF, ICC, IHC, BLOCK, Ctrl

SuperBlock™ (PBS) Blocking Buffer - Blotting (Thermo Scientific™)

Thermo Scientific SuperBlock (PBS) Blocking Buffer - Blotting is optimized PBS solution containing a protein that provides incredibly fast and effective blocking for Western blot analysis.

Features of SuperBlock (PBS) Blocking Buffer - Blotting:

Fast—block membranes in 5 to 10 minutes
Flexible—guaranteed to be biotin-free for use with streptavidin system
Low background—the non-serum protein solution yields a high signal-to-noise ratio
Stable—store buffer at 4°C for one year; store blocked plates dry for up to 12 months

Blocking micro-plates, membranes or tissues with a SuperBlock Buffer yields a high signal-to-noise ratio in most detection systems. The protein-based formulation does not contain any immunoglobulins, albumin or endogenous biotin, making it compatible in many situations where traditional blocking agents fail. The buffer is especially effective at blocking coated polystyrene microplates (96-well plates) and stabilizing them for drying and storage for later use.

Related Products
SuperBlock™ (PBS) Blocking Buffer
SuperBlock™ T20 (PBS) Blocking Buffer
SuperBlock™ (TBS) Blocking Buffer
SuperBlock™ T20 (TBS) Blocking Buffer
SuperBlock™ (TBS) Blocking Buffer Dry Blend

Pierce™ Protein-Free (PBS) Blocking Buffer (Thermo Scientific™)

Pierce Protein-Free Blocking Buffer is a non-protein compound that provides effective blocking for membrane-based and plate-based protein detection methods, resulting in extremely low background. It is supplied in a ready-to-use format.

Compare and view all available blocking buffers

Features of Protein-Free Blocking Buffer:
Protein-free blocker—minimizes or eliminates cross-reactivity associated with protein-based blocking buffers
Applications—western blotting (membranes), ELISA (microplates), and arrays (coated glass slides)
Streptavidin-friendly—free of biotin; no interference with avidin-biotin detection systems
High-performance—optimized and validated in many protein methods to provide high signal-to-noise ratio (i.e., no quenching of specific binding and signal but eliminating nonspecific binding and background)

Traditional blocking buffers contain proteins that can cross-react in certain immunodetection systems, resulting in high background and reduced signal. Pierce Protein-Free Blocking Buffers are devoid of protein while remaining highly effective at blocking plates, membranes, and other surfaces for ELISA, western blotting, glass slide arrays, and other applications.

Related products
Pierce Protein-Free T20 (PBS) Blocking Buffer
Pierce Protein-Free (TBS) Blocking Buffer
Pierce Protein-Free T20 (TBS) Blocking Buffer

ProcartaPlex Canine Basic Kit (Invitrogen™)

ProcartaPlex™ immunoassays are our ideal solution for assessing multiple protein biomarkers in a single sample.
Our ProcartaPlex assays use Luminex ™ xMAP technology for the multi-analyte detection of secreted proteins including cytokines, chemokines, growth factors and other proteins.
ProcartaPlex™ assays are subject to the same stringent and robust development and manufacturing as are our extensively validated Platinum and Instant ELISA kits. Quantitate multiple targets in cell/tissue culture supernatants, serum, and plasma.

Explore our broad portfolio of pre-configures panels and combinable single analytes.

For combination of only Simplex Kits an additional Basic Kit is required. This kit includes all non-target specific reagents - assay diluent, wash buffers, SA-PE and plates.

This kit does not contain a Multiscreen Filter Plate.

Suitable Sample Types
Cell culture supernatant, serum, plasma

Sample Volume
Serum, Plasma: 25 µL; CCS: 50 µL

Reported Application
Multiplex Immunoassay

Universal Assay Buffer (1X) (Invitrogen™)

The ProcartaPlex Universal Assay Buffer (1X) is developed for use with the ProcartaPlex assays. The ProcartaPlex Universal Assay Buffer (1X) is used for dilution of serum and plasma samples.
The ProcartaPlex Universal Assay Buffer (1X) is included in our basic kits and off the shelf panels. Additionally, we offer the Universal Assay Buffer as a stand-alone item.

Reported Application
Multiplex Immunoassay