Nitric Oxide Synthase, Inducible from mouse

recombinant, expressed in E. coli, buffered aqueous solution

NOS II, iNOS, Inducible Nitric Oxide Synthase, macNOS
Enzyme Commission number:
MDL number:
Pricing and availability is not currently available.

Quality Level


expressed in E. coli


buffered aqueous solution

specific activity

≥4.0 units/mg protein

mol wt

130 kDa (homodimer)
130 kDa (subunit, homodimer)

shipped in

dry ice

storage temp.


Gene Information

mouse ... Nos2(18126)

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General description

Inducible nitric oxide synthase (iNOS), also known as inflammatory nitric oxide synthase, is a calcium independent isoenzyme, involved in synthesis of nitric oxide (NO). It is a soluble enzyme encoded by the gene mapped to mouse chromosome 11. iNOS is active in dimeric form and its activity is induced by cytokines and various other stimuli. iNOS is expressed in various inflammatory conditions.


Nitric Oxide Synthase, Inducible from mouse has been used in immunohistochemical studies. It is also used to evaluate the therapeutic efficacy of inducible nitric oxide synthase (NOS) on reperfusion-induced microcirculatory alterations and hemodynamic adverse effects in the microvasculature of skeletal muscle.

Biochem/physiol Actions

Tumor-derived inducible nitric oxide synthase (iNOS) plays a vital role in stimulating tumor growth and vessel maturation. Therefore, it is considered to be a potential therapeutic target for anti-vascular cancer therapies. Unchecked activity of iNOS leads to overproduction of nitric oxide (NO), which is toxic for living cells. iNOS activity can be controlled at both transcription and translational level by regulating protein stability, dimerization, phosphorylation, cofactor binding and availability of oxygen and L-arginine as substrates. iNOS plays a vital role in excisional wound repair and exhibits gene therapy strategy to advance wound healing process in iNOS-deficient conditions such as diabetes and steroid treatment.
NOS is responsible for the biosynthesis of nitric oxide from L-arginine. iNOS is not calcium/calmodulin dependent and has a Km = 16 μM for L-arginine.

Unit Definition

One unit will produce 1.0 μmol of nitric oxide per minute at 37 °C in 50 mM HEPES, pH 7.4, containing 1 mM arginine, 1 mM magnesium acetate, 0.15 mM NADPH, 4.5 μM oxyhemoglobin, 18 μM tetrahydrobiopterin and 180 μM DTT.

Physical form

Solution in 50 mM HEPES, pH 7.4, with 10% glycerol, 8 μM tetrahydrobiopterin


NONH for all modes of transport

WGK Germany


Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Nitric oxide and nitric oxide synthase during
early lactation in water buffalo dams
M.E. Pero
Rev. Med. Vet. (Toulouse), 157, 16-19 (2006)
Enhancing Nitric Oxide Bioavailability via Exogen Nitric Oxide Synthase and L-Arginine Attenuates Ischemia-Reperfusion-Induced Microcirculatory Alterations.
Engel H
Annals of Plastic Surgery (2014)
Mapping of the gene for inducible nitric oxide (NO) synthase of mouse macrophages to chromosome 11, close to Evi-2, nu, and Idd-4.
Jenkins NA
Genomics, 19(2), 402-404 (1994)
Investigating the role of tumour cell derived iNOS on tumour growth and vasculature in vivo using a tetracycline regulated expression system.
Papaevangelou E
International Journal of Cancer. Journal International Du Cancer, 138(11), 2678-2687 (2016)
iNOS-mediated nitric oxide production and its regulation.
Aktan F
Life Sciences, 75(6), 639-653 (2004)
Oxidative stress is mediated, in part, by reactive oxygen species produced by multiple cellular processes and controlled by cellular antioxidant mechanisms such as enzymatic scavengers or antioxidant modulators. Free radicals, such as reactive oxygen species, cause cellular damage via cellular.
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