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Nitric Oxide Synthase Activity Assay Kit (Fluorometric) (ab211084) provides an accurate and convenient method to assay nitric oxide synthase (NOS) activity in cell and tissue lysates.


Images

Functional Studies - Nitric Oxide Synthase Activity Assay Kit (Fluorometric) (AB211084), expandable thumbnail
  • Functional Studies - Nitric Oxide Synthase Activity Assay Kit (Fluorometric) (AB211084), expandable thumbnail
  • Functional Studies - Nitric Oxide Synthase Activity Assay Kit (Fluorometric) (AB211084), expandable thumbnail
  • Functional Studies - Nitric Oxide Synthase Activity Assay Kit (Fluorometric) (AB211084), expandable thumbnail

Publications

Key facts

Detection method

Fluorescent

Sample types

Tissue Lysate, Cell Lysate

Assay type

Enzyme activity (quantitative)

Reactive species

Mammals

Sensitivity

= 0.75 µU

What's included?

100 Test
Components
25X NOS Cofactor 2
1 x 100 µL
DAN Probe
1 x 1 mL
Enhancer II
1 x 1 Vial
NOS Assay Buffer
1 x 25 mL
NOS Cofactor I
1 x 1 Vial
NOS Dilution Buffer
1 x 1.5 mL
NOS Positive Control
1 x 4 µL
NOS Substrate
1 x 500 µL
Nitrate Reductase II
1 x 1 Vial
Nitrite Standard
1 x 1 Vial
Sodium Hydroxide
1 x 1 mL

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Nitric Oxide Synthase Activity Assay Kit (Fluorometric) (ab211084) provides an accurate and convenient method to assay nitric oxide synthase (NOS) activity in cell and tissue lysates.

Key facts

Detection method

Fluorescent

Sample types

Tissue Lysate, Cell Lysate

Assay type

Enzyme activity (quantitative)

Reactive species

Mammals

Assay Platform

Microplate reader

Sensitivity

= 0.75 µU

Storage

Shipped at conditions

Dry Ice

Appropriate short-term storage conditions

-80°C

Appropriate long-term storage conditions

-80°C

Storage information

Please refer to protocols

Notes

Nitric Oxide Synthase Activity Assay Kit (Fluorometric) (ab211084) provides an accurate and convenient method to assay nitric oxide synthase (NOS) activity in cell and tissue lysates. In this assay, nitric oxide (NO) generated by NOS undergoes a series of reactions and reacts with the fluorescent probe to generate a stable signal at Ex/Em = 360/450 nm, which is directly proportional to NOS activity. The assay is simple, sensitive and high-throughput adaptable and can detect as low as 0.75 μU of NOS activity.

This product is manufactured by BioVision, an Abcam company and was previously called K206 Nitric Oxide Synthase (NOS) Activity Assay Kit (Fluorometric). K206-100 is the same size as the 100 test size of ab211084.

Nitric oxide synthases (EC 1.14.13.39) (NOS) are a family of enzymes that catalyze the production of nitric oxide (NO) from L-arginine. Nitric oxide (NO) plays an important role in neurotransmission, vascular regulation, immune response and apoptosis. In presence of NADPH, FAD, FMN, (6R)-5,6,7,8-tetrahydrobiopterin, calmodulin and heme, NOS catalyzes a five-electron oxidation of the guanidino nitrogen of L-arginine with molecular oxygen to generate NO and L-citrulline. There are three isoforms of NOS: endothelial (eNOS), neuronal (nNOS), and inducible (iNOS). nNOS accounts for the production of NO in central nervous system, where NO participates in cell communication and information storage. eNOS produces NO in blood vessels and is involved in regulation of vascular function. In contrast to other isoforms, iNOS is expressed de novo under oxidative stress conditions and produces large amounts of NO as a part of body's defense mechanism.

Supplementary info

This supplementary information is collated from multiple sources and compiled automatically.

Activity summary

NNOS also known as nitric oxide synthase 1 or NOS1 is a critical enzyme in the nervous system. It catalyzes the production of nitric oxide from L-arginine. This enzyme weighing approximately 160 kDa is expressed in neurons and you can find it in regions like the brain and spinal cord. Notably nNOS is part of the NOS family which also includes eNOS and iNOS but its primary function is in neuronal tissues.

Biological function summary

NNOS plays a significant role in neurotransmission and neurovascular regulation. As a part of protein complexes nNOS closely interacts with other signaling molecules to modulate neuronal communication. The production of nitric oxide by nNOS acts as a neurotransmitter influencing brain functions such as synaptic plasticity and memory formation. Additionally due to its role in neuronal activity antibodies like anti-neuronal antibodies can have interactions that can be studied using various assays including the NOS assay.

Pathways

NNOS serves essential roles within the neuronal nitric oxide signaling pathway and the glutamatergic signaling pathway. In these contexts nNOS associates with proteins involved in cell signaling such as calmodulin which regulates its activity. By participating in these pathways nNOS contributes to the regulation of vascular tone and synaptic transmission linking it to neurological processes and supporting neuronal communication.

Associated diseases and disorders

NNOS shows significant connections to neurological disorders and cardiovascular diseases. In conditions like stroke and neurodegenerative diseases dysregulation of nNOS activity leads to excessive production of nitric oxide which can result in oxidative stress and neuronal damage. Furthermore its relation with eNOS in the cardiovascular system influences vascular function making it a critical player in hypertension studies. Understanding nNOS interactions through diseases highlights the possibility of targeted treatments using neuronal antibodies and anti-neuronal antibodies against specific pathways.

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4 product images

  • Functional Studies - Nitric Oxide Synthase Activity Assay Kit (Fluorometric) (ab211084), expandable thumbnail

    Functional Studies - Nitric Oxide Synthase Activity Assay Kit (Fluorometric) (ab211084)

    Nitric Oxide Synthase Activity Assay Kit (Fluorometric) (ab211084). Typical standard calibration curve.

  • Functional Studies - Nitric Oxide Synthase Activity Assay Kit (Fluorometric) (ab211084), expandable thumbnail

    Functional Studies - Nitric Oxide Synthase Activity Assay Kit (Fluorometric) (ab211084)

    Nitric Oxide Synthase Activity Assay Kit (Fluorometric) (ab211084). Detection of endogenous NOS activity in cell lysates from J774.1A mouse monocytes (135 μg) and HeLa cells (157 μg).

  • Functional Studies - Nitric Oxide Synthase Activity Assay Kit (Fluorometric) (ab211084), expandable thumbnail

    Functional Studies - Nitric Oxide Synthase Activity Assay Kit (Fluorometric) (ab211084)

    Nitric Oxide Synthase Activity Assay Kit (Fluorometric) (ab211084). Detection of endogenous NOS activity in J774.1A cell lysates. J774 cells were stimulated with 200 ng/mL LPS and 100 ng/mL murine IFN-gamma. Unstimulated control included. Cell lysates were prepared (225 μg) and assayed following the kit protocol.

  • Functional Studies - Nitric Oxide Synthase Activity Assay Kit (Fluorometric) (ab211084), expandable thumbnail

    Functional Studies - Nitric Oxide Synthase Activity Assay Kit (Fluorometric) (ab211084)

    Nitric Oxide Synthase Activity Assay Kit (Fluorometric) (ab211084). Measurement of NOS Positive Control activity (5 μL) compared to blank (assay buffer).

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Product protocols

For this product, it's our understanding that no specific protocols are required. You can:

Please note: All products are 'FOR RESEARCH USE ONLY. NOT FOR USE IN DIAGNOSTIC OR THERAPEUTIC PROCEDURES'.

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