35794 Results for: "Capitol Vial Specimen Collection"

Activation of cells by LPS is mediated by the Toll-like receptor 4 (TLR4), a member of the highly conserved protein family of TLRs, which are specialised in the recognition of microbial components. In mice, defects in TLR4 result in LPS unresponsiveness. For optimal interaction with LPS, TLR4 requires association with myeloid differentiation protein 2 (MD-2). According to current consensus activation of TLR4 is preceded by the transfer of LPS to membrane-bound (m) or soluble (s) CD14 by LPS-binding protein (LBP). This mechanism is believed to be generally true for LPS signaling. Re-form LPS and lipid A, but not S-form LPS, are capable of inducing TNF-alpha responses also in the absence of CD14. LPS, synthesized by most wild-type (WT) Gram-negative bacteria (S-form LPS), consists of three regions, the O-polysaccharide chain, which is made up of repeating oligosaccharide units, the core oligosaccharide and the lipid A, which harbors the endotoxic activity of the entire molecule. R-form LPS synthesized by the so-called rough (R) mutants of Gram-negative bacteria lacks the O-specific chain. Furthermore, the core-oligosaccharide may be present in different degrees of completion, depending on the class (Ra to Re) to which the mutant belongs. Monophosphoryl Lipid A (MPLA) represents a detoxified derivative of Lipid A and constitutes an important adjuvant in prophylactic and therapeutic vaccines.

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Avanti™ J-15 Series Benchtop Centrifuges, Beckman Coulter®

Supplier: Beckman Coulter

The Avanti™ J-15 series of benchtop centrifuges (refrigerated or ventilated) leverage the ultra harmonic technology, designed to protect your sample and increase workflow time efficiencies.

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5,5'-Dithiobis(2-nitrobenzoic acid) (Ellmans reagent, DTNB)

Supplier: Adipogen

A sensitive reagent for measuring the free sulfhydryl content in proteins, peptides, and tissues. Used to characterize reactive thiol groups and photometric determination of thiols and for measuring low-molecular mass thiols such as glutathione in both pure solutions and biological samples, such as blood. It can also measure the number of thiol groups on proteins. Through reaction with aliphatic thiol groups a mixed disulfide of protein thiol and one mole of 2-nitro-5-thiobenzoate per mole of protein sulfhydryl group is being formed. DTNB has little absorbance. Reaction with -SH groups on proteins (from any solvent accessible Cys) under mild alkaline conditions (pH 7-8) produces the 2-nitro-5-thiobenzoate anion, which gives an intense yellow color with an absorption maximum at 409.5nm (Extinction coefficient: 14150 M-1*cm-1). Sensitive to various buffer ions, therefore, the extinction coefficient used to calculate the number of sulfhydryl groups must be matched to the reaction conditions. In case the thiol groups are in disulfide bonds, they must be reduced under anaerobic conditions prior to reaction with DTNB.

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Asiaticoside ≥95% (by NMR)

Supplier: Adipogen

Antibacterial. Human collagen I synthesis inducer. Anti-wrinkle activity. Shows wound healing activity. Enhances normal human skin cell migration, attachment and growth. Suppresses collagen expression and TGF-beta/Smad signaling by inducing Smad7 and inhibiting TGF-betaRI and TGF-betaRII. Anti-inflammatory. Anti-gastric ulcer. Mitogen-activated protein kinases (MAPKs), nuclear factor-kappaB (NF-kappaB), cyclooxygenase-2 (COX-2) and inducible nitric oxide synthase (iNOS; NOSII) expression, production of serum tumor necrosis factor (TNF-alpha) and interleukin-6 (IL-6) inhibitor. Apoptosis inducer in cancer cells. Enhances antitumor activity of vincristine in cancer cells. Might be useful in cancer chemotherapy. Anxiolytic. Antidepressant-like activity. Hepatoprotective effects. CYP2C19 and CYP3A4 inhibitor. Neuroprotective. Antileishmanial activity. cPLA2 and sPLA2 inhibitor.

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Mag-Bind® PX blood RNA 96 kit, Omega Bio-Tek

Supplier: Omega Bio-Tek

The Mag-Bind® PX blood RNA kit allows for the isolation of total RNA from 2,5 ml of whole blood that has been stored in PAXgene® Blood RNA tubes. Stabilised blood samples are first spun down and the nucleic acid pellets are washed and recollected. After washing, the nucleic acid pellet is dissolved into a specially formulated resuspension buffer. At this point the samples can be transferred to 96-well plates for processing in robotic liquid handlers and magnetic processors. High quality intact RNA can be isolated in less than 90 minutes.

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CELL HCT-8 HRT-18 HUMAN COLON EPITHELIAL

Supplier: AMERICAN TYPE CULTURE COLLECTION MS

CELL HCT-8 HRT-18 HUMAN COLON EPITHELIAL

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CELL LINE C8-B4 MOUSE BRAIN MONOCYTE

Supplier: AMERICAN TYPE CULTURE COLLECTION MS

CELL LINE C8-B4 MOUSE BRAIN MONOCYTE

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Phenol red sodium salt

Supplier: Adipogen

Water soluble pH indicator used in the 6.8 (yellow) to 8.2 (red) range and frequently used in cell biology laboratories. Widely used as cell tissue culture pH marker. A small amount of phenol red added to the growth medium will have a pink-red color under normal conditions. Typically, 15 mg/l are used for cell culture. In the event of problems, waste products produced by dying cells or overgrowth of contaminants will cause a change in pH, leading to a change in indicator color. For example, a culture of relatively slowly dividing mammalian cells can be quickly overgrown by bacterial contamination. This usually results in an acidification of the medium, turning it yellow. The waste products produced by the mammalian cells themselves will slowly decrease the pH, gradually turning the solution orange and then yellow. This color change is an indication that even in the absence of contamination, the medium needs to be replaced. Shown to be a weak estrogen mimic (possible through inpurities), which can enhance the growth of cells that express the estrogen receptor in cell cultures. Might be useful as a differentiation factor.

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Lipopolysaccharides (from E.coli) ≥99.9%, TLRpure, sterile

Supplier: Adipogen

Activation of cells by LPS is mediated by the Toll-like receptor 4 (TLR4). For optimal interaction with LPS, TLR4 requires association with myeloid differentiation protein 2 (MD-2). According to current consensus activation of TLR4 is preceded by the transfer of LPS to membrane-bound (m) or soluble (s) CD14 by LPS-binding protein (LBP). Re-form LPS and lipid A, but not S-form LPS, are capable of inducing TNF-alpha responses also in the absence of CD14. LPS, synthesized by most wild-type (WT) Gram-negative bacteria (S-form LPS), consists of three regions, the O-polysaccharide chain, which is made up of repeating oligosaccharide units, the core oligosaccharide and the lipid A, which harbors the endotoxic activity of the entire molecule. R-form LPS synthesized by the so-called rough (R) mutants of Gram-negative bacteria lacks the O-specific chain. Furthermore, the core-oligosaccharide may be present in different degrees of completion, depending on the class (Ra to Re) to which the mutant belongs. LPS are amphipathic molecules whose hydrophobicity decreases with increasing length of the sugar part. Based upon these differences, S- and R-form LPS show marked differences in the kinetics of their blood clearance and cellular uptake as well as in the ability to induce oxidative burst in human granulocytes and to activate the host complement system.

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Wizard SV 96 PCR Clean-Up Start-Up Kit, 110 V Electrical (8×96 Preps, Manifold and Free Vacuum Pump), Promega

Supplier: Promega Corporation

The Wizard SV 96 PCR Clean-Up System is designed for high-throughput purification of 100bp-10kb PCR products from excess nucleotides, primers and primer dimers.

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Quick-cfDNA™ Serum and Plasma Kit, Zymo Research

Supplier: Zymo Research

Quick-cfDNA™ Serum amd Plasma kit provides a simple and reliable method for the rapid preparation of high-quality circulating cell-free DNA from serum, plasma, amniotic fluid, cerebrospinal fluid (CSF), and saliva.