A technique for the screening of antioxidant exercise is reported as a decolorization assay relevant to each lipophilic and hydrophilic antioxidants, together with flavonoids, hydroxycinnamates, carotenoids, and plasma antioxidants. The pre-formed radical monocation of two,2′-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS*+) is generated by oxidation of ABTS with potassium persulfate and is diminished within the presence of such hydrogen-donating antioxidants.

The influences of each the focus of antioxidant and period of response on the inhibition of the novel cation absorption are taken into consideration when figuring out the antioxidant exercise. This assay clearly improves the unique TEAC assay (the ferryl myoglobin/ABTS assay) for the willpower of antioxidant exercise in various methods.

First, the chemistry includes the direct technology of the ABTS radical monocation with no involvement of an middleman radical. Second, it’s a decolorization assay; thus the novel cation is pre-formed previous to addition of antioxidant take a look at techniques, slightly than the technology of the novel happening regularly within the presence of the antioxidant.

Therefore the outcomes obtained with the improved system could not all the time be straight comparable with these obtained utilizing the unique TEAC assay. Third, it’s relevant to each aqueous and lipophilic techniques.

Exact mapping of DNA methylation patterns in CpG islands has change into important for understanding various organic processes such because the regulation of imprinted genes, X chromosome inactivation, and tumor suppressor gene silencing in human most cancers.

We describe a brand new methodology, MSP (methylation-specific PCR), which may quickly assess the methylation standing of just about any group of CpG websites inside a CpG island, unbiased of using methylation-sensitive restriction enzymes.

This assay entails preliminary modification of DNA by sodium bisulfite, changing all unmethylated, however not methylated, cytosines to uracil, and subsequent amplification with primers particular for methylated versus unmethylated DNA. MSP requires solely small portions of DNA, is delicate to 0.1% methylated alleles of a given CpG island locus, and might be carried out on DNA extracted from paraffin-embedded samples.

MSP eliminates the false optimistic outcomes inherent to earlier PCR-based approaches which relied on differential restriction enzyme cleavage to tell apart methylated from unmethylated DNA. On this examine, we reveal using MSP to establish promoter area hypermethylation modifications related to transcriptional inactivation in 4 essential tumor suppressor genes (p16, p15, E-cadherin, and von Hippel-Lindau) in human most cancers.

We have now developed a fast, delicate, and cheap methodology for measuring the mobile protein content material of adherent and suspension cultures in 96-well microtiter plates. The tactic is appropriate for odd laboratory functions and for very large-scale purposes, such because the Nationwide Most cancers Institute’s disease-oriented in vitro anticancer-drug discovery display screen, which requires using a number of million tradition wells per 12 months.

Cultures fastened with trichloroacetic acid had been stained for 30 minutes with 0.4% (wt/vol) sulforhodamine B (SRB) dissolved in 1% acetic acid. Unbound dye was eliminated by 4 washes with 1% acetic acid, and protein-bound dye was extracted with 10 mM unbuffered Tris base [tris (hydroxymethyl)aminomethane] for willpower of optical density in a computer-interfaced, 96-well microtiter plate reader.

The SRB assay outcomes had been linear with the variety of cells and with values for mobile protein measured by each the Lowry and Bradford assays at densities starting from sparse subconfluence to multilayered supraconfluence. The signal-to-noise ratio at 564 nm was roughly 1.5 with 1,000 cells per properly.

The sensitivity of the SRB assay in contrast favorably with sensitivities of a number of fluorescence assays and was superior to these of each the Lowry and Bradford assays and to these of 20 different seen dyes. The SRB assay gives a colorimetric finish level that’s nondestructive, indefinitely secure, and visual to the bare eye.

Assay Buffer, 28ML
X053-28ML	Arbor Assays	28ML	EUR 123

Assay Buffer, 55ML
X053-55ML	Arbor Assays	55ML	EUR 153

Assay Buffer, 60ML
X089-60ML	Arbor Assays	60ML	EUR 109

Assay Buffer, 50ML
X100-50ML	Arbor Assays	50ML	EUR 109

Assay Buffer, 50ML
X117-50ML	Arbor Assays	50ML	EUR 143

Lactose Assay Kit
MET-5001	Cell Biolabs	100 assays	EUR 432
Description: The Lactose Assay Kit measures total lactose in milk based food products or biological samples such as blood or urine. Lactose is cleaved into glucose and galactose. Glucose is then oxidized, yielding hydrogen peroxide and D-gluconic acid. The hydrogen peroxide is detected by a fluorometric probe.

Bilirubin Assay Kit
MET-5010	Cell Biolabs	200 assays	EUR 479
Description: Bilirubin, a byproduct of heme breakdown, can exist conjugated to glucuronic acid (direct) and as unconjugated (indirect). The unconjugated form is found in the blood bound to albumin and is transported to the liver. Bilirubin becomes conjugated to glucuronic acid in the liver, making it more soluble and allowing for excretion into bile. High levels of bilirubin have been correlated with jaundice and Gilbert?s syndrome while low levels have been associated with cardiovascular disease and diabetes mellitus.

Pyruvate Assay Kit
MET-5029	Cell Biolabs	100 assays	EUR 479
Description: Our Pyruvate Assay Kit measures pyruvate in biological samples. First, pyruvate is oxidized by pyruvate oxidase, producing hydrogen peroxide. The hydrogen peroxide is then detected at ex. 530-570 nm/em. 590-600 nm using a specific fluorometric probe. Pyruvate levels in unknown samples are determined based on the provided pyruvate standard curve.

Glycine Assay Kit
MET-5070	Cell Biolabs	100 assays	EUR 450

Taurine Assay Kit
MET-5071	Cell Biolabs	200 assays	EUR 508

Sarcosine Assay Kit
MET-5072	Cell Biolabs	100 assays	EUR 450

Tyrosine Assay Kit
MET-5073	Cell Biolabs	100 assays	EUR 450

Phospholipid Assay Kit
MET-5085	Cell Biolabs	96 assays	EUR 456

Ammonia Assay Kit
MET-5086	Cell Biolabs	100 assays	EUR 456

Adenosine Assay Kit
MET-5090	Cell Biolabs	100 assays	EUR 508

Inosine Assay Kit
MET-5092	Cell Biolabs	100 assays	EUR 508

Alanine Assay Kit
MET-5093	Cell Biolabs	200 assays	EUR 508

Urea Assay Kit
STA-382	Cell Biolabs	192 assays	EUR 635
Description: Cell Biolabs? Urea Assay Kit is based on the Berthelot reaction.  Urea is first degraded into ammonia and carbon dioxide, which further reacts with an alkaline developer to produce a blue-green colored product that can be measured with a standard spectrophotometric plate reader at an optical density between 580-630 nm.  Each kit provides sufficient reagents to perform up to 192 assays, including blanks, urea standards and unknown samples.

Rac1 Activation Assay
STA-401-1	Cell Biolabs	20 assays	EUR 757
Description: Our Rac Activation Assays use visible agarose beads to selectively precipitate the active form of Rac1 or Rac2. The precipitated small GTPase is then detected by Western blot using a Rac1- or Rac2-specific antibody included in the kit.

Rac2 Activation Assay
STA-401-2	Cell Biolabs	20 assays	EUR 757
Description: Our Rac Activation Assays use visible agarose beads to selectively precipitate the active form of Rac1 or Rac2. The precipitated small GTPase is then detected by Western blot using a Rac1- or Rac2-specific antibody included in the kit.

Cdc42 Activation Assay
STA-402	Cell Biolabs	20 assays	EUR 757
Description: Our Cdc42 Activation Assays use visible agarose beads to selectively precipitate the active form of Cdc42 protein. The precipitated small GTPase is then detected by Western blot using a Cdc42-specific antibody included in the kit.

RhoA Activation Assay
STA-403-A	Cell Biolabs	20 assays	EUR 757
Description: Our Rho Activation Assays use visible agarose beads to selectively precipitate the active form of RhoA, RhoB or RhoC. The precipitated small GTPase is then detected by Western blot using a RhoA-, RhoB- or RhoC-specific antibody included in the kit.

RhoB Activation Assay
STA-403-B	Cell Biolabs	20 assays	EUR 757
Description: Our Rho Activation Assays use visible agarose beads to selectively precipitate the active form of RhoA, RhoB or RhoC. The precipitated small GTPase is then detected by Western blot using a RhoA-, RhoB- or RhoC-specific antibody included in the kit.

RhoC Activation Assay
STA-403-C	Cell Biolabs	20 assays	EUR 757
Description: Our Rho Activation Assays use visible agarose beads to selectively precipitate the active form of RhoA, RhoB or RhoC. The precipitated small GTPase is then detected by Western blot using a RhoA-, RhoB- or RhoC-specific antibody included in the kit.

Arf1 Activation Assay
STA-407-1	Cell Biolabs	20 assays	EUR 757
Description: Our Arf Activation Assays use visible agarose beads to selectively precipitate the active form of Arf1 or Arf 6. The precipitated small GTPase is then detected by Western blot using an Arf1- or Arf6-specific antibody included in the kit.

Arf6 Activation Assay
STA-407-6	Cell Biolabs	20 assays	EUR 757
Description: Our Arf Activation Assays use visible agarose beads to selectively precipitate the active form of Arf1 or Arf 6. The precipitated small GTPase is then detected by Western blot using an Arf1- or Arf6-specific antibody included in the kit.

Ral Activation Assay
STA-408	Cell Biolabs	20 assays	EUR 757
Description: Our Ral Activation Assay uses visible agarose beads to selectively precipitate the active form of Ral protein. The precipitated small GTPase is then detected by Western blot using a Ral-specific antibody included in the kit.

Ran Activation Assay
STA-409	Cell Biolabs	20 assays	EUR 757
Description: Our Ran Activation Assay uses visible agarose beads to selectively precipitate the active form of Ran protein. The precipitated small GTPase is then detected by Western blot using a Ran-specific antibody included in the kit.

Phosphatidylcholine Assay Kit
STA-600	Cell Biolabs	96 assays	EUR 519
Description: Cell Biolabs? Phosphatidylcholine Assay Kit measures the phosphatidylcholine present within serum, plasma, or tissue samples.Samples are compared to a known concentration of phosphatidylcholine standard within the 96-well microtiter plate format.  Samples and standards are incubated for 60 minutes and then read with a standard 96-well fluorometric plate reader.

Sphingomyelin Assay Kit
STA-601	Cell Biolabs	96 assays	EUR 519
Description: Cell Biolabs? Sphingomyelin Assay Kit is a simple fluorometric assay that measures the amount of sphingomyelin present in plasma or serum, tissue homogenates, or cell suspensionsin a 96-well microtiter plate format.  Each kit provides sufficient reagents to perform up to 96 assays, including blanks, sphingomyelin standards and unknown samples.  Sample sphingomyelin concentrations are determined by comparison with a known sphingomyelin standard.

Glutamate Assay Kit
STA-674	Cell Biolabs	200 assays	EUR 514
Description: Glutamate is a non-essential amino acid that serves as an important neurotransmitter in the mammalian brain and has a key role in cellular metabolism. Excess glutamate levels in the brain can cause cell injury and death, leading to neurological diseases. Our Glutamate Assay Kit is a quantitative, fluorometric assay that uses glutamate specific enzymes to generate hydrogen peroxide. An ADHP probe is oxidized by hydrogen peroxide to generate fluorescent Resorufin, which correlates to the level of glutamate in the sample. Glutamate levels in an unknown sample are calculated based on a glutamate standard curve.

Hydroxyproline Assay Kit
STA-675	Cell Biolabs	96 assays	EUR 514
Description: The Hydroxyproline Assay Kit is a quantitative colorimetric assay for measuring the hydroxyproline concentration in protein samples, including collagen where it is found almost exclusively.

Autophagy Assay, Red
KF17373	Neuromics	50 Tests	EUR 278

Histamine Assay Kit
AKR-360	Cell Biolabs	96 assays	EUR 519
Description: Histamine is naturally occurring in food, with high concentrations associated with spoiled and fermented foods. Exposure to high levels of histamine through the ingestion of food can cause symptoms similar to an allergic response. Our Histamine Assay Kit detects total histamine from food samples using a colorimetric probe. Reduction of the probe yields color development proportional the histamine levels in the sample. Absorbance at 450nm is read after a one hour incubation at 37C and histamine levels are calculated based on a histamine standard curve.

Glucose Assay Kit
abx090673-1Kit	Abbexa	1 Kit	EUR 237

It gives a delicate measure of drug-induced cytotoxicity, is beneficial in quantitating clonogenicity, and is properly suited to high-volume, automated drug screening. SRB fluoresces strongly with laser excitation at 488 nm and might be measured quantitatively on the single-cell degree by static fluorescence cytometry.