Amplex™ Red Glutamic Acid/Glutamate Oxidase Assay Kit
Amplex™ Red Glutamic Acid/Glutamate Oxidase Assay Kit
Invitrogen™

Amplex™ Red Glutamic Acid/Glutamate Oxidase Assay Kit

The Amplex™ Red Glutamic Acid/Glutamate Oxidase Assay Kit provides a sensitive and simple method for detecting glutamic acid/glutamate oxidase activityRead more
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Catalog NumberQuantity
A12221200 Assays
Catalog number A12221
Price (TWD)
14,980.00
キャンペーン価格
Ends: 31-Dec-2025
21,400.00
Save 6,420.00 (30%)
Each
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Quantity:
200 Assays
Price (TWD)
14,980.00
キャンペーン価格
Ends: 31-Dec-2025
21,400.00
Save 6,420.00 (30%)
Each
Add to cart
The Amplex™ Red Glutamic Acid/Glutamate Oxidase Assay Kit provides a sensitive and simple method for detecting glutamic acid/glutamate oxidase activity using a fluorescence microplate reader or fluorometer.

See our complete line of Fluorescence Microplate assays.

• Detect concentrations as low as 10 nM L-glutamic acid or 40 μU/mL of purified L-glutamate oxidase
• Format allows for multiple time point measurements
• Designed for minimal autofluorescence interference

The Amplex™ Red Glutamic Acid/Glutamate Oxidase Assay Kit provides an ultrasensitive method for detecting glutamic acid or for continuously monitoring glutamate oxidase activity using a fluorescence microplate reader or fluorometer. In the assay, L-glutamic acid is oxidized by glutamate oxidase to produce α-ketoglutarate, NH3, and hydrogen peroxide. L-alanine and L-glutamate–pyruvate transaminase are included in the reaction to regenerate L-glutamic acid by transamination of α-ketoglutarate, resulting in multiple cycles of the initial reaction and a significant amplification of the hydrogen peroxide produced. The hydrogen peroxide reacts with 10-acetyl-3,7-dihydroxyphenoxazine (Amplex™ Red reagent) in a 1:1 stoichiometric ratio in a reaction catalyzed by horseradish peroxidase (HRP) to generate the highly fluorescent product resorufin.

Because resorufin has absorption and fluorescence emission maxima of approximately 571 nm and 585 nm, respectively, there is little interference from autofluorescence in most biological samples.

Use Amplex™ Red Assays for a Broad Range of Investigations
A wide variety of validated Amplex™ Red assays are available for studying cell signaling and lipids, neurobiology, inflammation and immune function, and metabolism. We also offer Amplex™ UltraRed Reagent (Cat. No. A36006), a second-generation reagent providing greater sensitivity and brighter fluorescence, and the Amplex™ Red/UltraRed Stop Reagent (Cat. No. A33855). The Amplex™ Red/UltraRed Stop Reagent provides convenience and control by allowing the fluorescence signal-generating reaction to be terminated at a user-determined time point. After addition of the stop reagent, the fluorescence signal remains stable for at least three hours. Custom assay design and packaging are also available.
For Research Use Only. Not for use in diagnostic procedures.
Specifications
Detection MethodFluorescence
Dye TypeOther Label(s) or Dye(s)
Format96-well plate
Quantity200 Assays
Shipping ConditionRoom Temperature
For Use With (Application)Glutamic Acid/Glutamate Oxidase Assay
For Use With (Equipment)Fluorometer, Microplate Reader
Product LineAmplex
Product TypeAmplex Red Assay Kit
Unit SizeEach
Contents & Storage
Store in freezer -5°C to -30°C and protect from light.

Frequently asked questions (FAQs)

I'm using an Amplex Red kit, the reagent changes color to pink almost immediately in my own Krebs-Ringer buffer but not in HBSS. Why is this?

The components of Krebs-Ringer buffer (salts) should not cause oxidation of the Amplex reagent (which, in the presence of peroxidase and H2O2 oxidizes to resorufin, which is pink in color and fluorescent). Try water alone (the water used to make the Krebs-Ringer buffer). Since Hank's Buffered Saline Solution is typically purchased rather than made in the lab, it likely would not have the same contaminant. Another option is to degas the buffer prior to use to removed dissolved oxygen radicals.

Find additional tips, troubleshooting help, and resources within our Cell Analysis Support Center.

Can Amplex Red Assays be performed using cell lysates?

This is not recommended. The presence of endogenous proteases can complicate the assay by degrading the horseradish peroxidase (HRP). Endogenous peroxidases and antioxidants can modify the H2O2 required for the reaction, competing with HRP (and catalase) for the substrate.

The Amplex Red Assays are best performed with either purified enzymes or extracted H2O2 in a defined buffer system, extracellular solutions or body fluids (media, serum, etc.) that do not exhibit high levels of endogenous protease or oxidase activity and do not contain antioxidants.

Find additional tips, troubleshooting help, and resources within our Cell Analysis Support Center.

Citations & References (13)

Citations & References
Abstract
Glutamate excitotoxicity is involved in cell death caused by tributyltin in cultured rat cortical neurons.
Authors:Nakatsu Y, Kotake Y, Komasaka K, Hakozaki H, Taguchi R, Kume T, Akaike A, Ohta S,
Journal:Toxicol Sci
PubMed ID:16207939
'Tributyltin, an endocrine-disrupting chemical, has been used as a heat stabilizer, agricultural pesticide, and component of antifouling paints. In this study, the neurotoxicity of tributyltin was investigated in cultured rat cortical neurons. Tributyltin caused marked time- and dose-dependent increases in the number of trypan blue-stained cells. Measurement of extracellular glutamate ... More
Iron alters glutamate secretion by regulating cytosolic aconitase activity.
Authors:McGahan MC, Harned J, Mukunnemkeril M, Goralska M, Fleisher L, Ferrell JB
Journal:Am J Physiol Cell Physiol
PubMed ID:15613494
'Glutamate has many important physiological functions, including its role as a neurotransmitter in the retina and the central nervous system. We have made the novel observations that retinal pigment epithelial cells underlying and intimately interacting with the retina secrete glutamate and that this secretion is significantly affected by iron. In ... More
Bispecific small molecule-antibody conjugate targeting prostate cancer.
Authors:Kim CH, Axup JY, Lawson BR, Yun H, Tardif V, Choi SH, Zhou Q, Dubrovska A, Biroc SL, Marsden R, Pinstaff J, Smider VV, Schultz PG,
Journal:
PubMed ID:24127589
'Bispecific antibodies, which simultaneously target CD3 on T cells and tumor-associated antigens to recruit cytotoxic T cells to cancer cells, are a promising new approach to the treatment of hormone-refractory prostate cancer. Here we report a site-specific, semisynthetic method for the production of bispecific antibody-like therapeutics in which a derivative ... More
Single cell glutamate analysis in Aplysia sensory neurons.
Authors:Drake TJ, Jezzini S, Lovell P, Moroz LL, Tan W
Journal:J Neurosci Methods
PubMed ID:15848241
'Glutamate is the major excitatory neurotransmitter in the central nervous system. However, techniques and assays available for the determination and detection of glutamate are limited. Here we have applied an effective glutamate assay toward the high-throughput analysis of single neurons. Initial physiological studies and recent immunohistochemical data strongly suggested that ... More
P2X agonist BzATP interferes with amplex-red-coupled fluorescence assays.
Authors:León D, Marín-García P, Sánchez-Nogueiro J, de la O FO, García-Carmona F, Miras-Portugal MT,
Journal:Anal Biochem
PubMed ID:17562321
'This paper does not have an abstract.'