78817 Results for: "LC-MS"

Supplier: YSI

The Pro30 provides everything you need in a handheld meter that measures salinity, conductivity, specific conductance, total dissolved solids, and temperature

Supplier: Prosci

The fragmentation of nuclear DNA is a hallmark of apoptotic cell death. The activities of caspase and nuclease are involved in the DNA fragmentation. Caspase-activated deoxyribo-nuclease (CAD), also termed DNA fragmentation factor (DFF40), is one such nuclease, and is capable of inducing DNA fragmentation and chromatin condensation after cleavage by caspase-3 of its inhibitor ICAD/DFF45. Caspase and CAD independent DNA fragmentation also exists. Recent studies demonstrated that another nuclease, endonuclease G (EndoG), is specifically activated by apoptotic stimuli and is able to induce nucleosomal fragmentation of DNA independently of caspase and DFF/CAD (1-3). EndoG is a mitochondrion-specific nuclease that translocates to the nucleus and cleaves chromatin DNA during apoptosis. The homologue of mammalian EndoG is the first mitochondrial protein identified to be involved in apoptosis in C. elegans (2). EndoG also cleaves DNA in vitro (4).

Supplier: Invitrogen

Heavy and Light Amino Acids are used to specifically analyze protein expression by mass spectrometry using stable isotope labeling with amino acids in cell culture (SILAC) quantification kits. Store at 2 - 8˚C.

Supplier: LEARN ENGINES SE

A fun Who-Done-It mystery that teaches through Problem Based Learning.

Supplier: Invitrogen

Thermo Scientific Heavy and Light Amino Acids are used to specifically analyze protein expression by mass spectrometry using stable isotope labeling with amino acids in cell culture (SILAC) quantification kits.

Supplier: Prosci

Apoptosis plays a major role in normal organism development, tissue homeostasis, and removal of damaged cells. Disruption of this process has been implicated in a variety of diseases such as cancer (reviewed in 1). Apoptosis is induced by certain cytokines including TNF and Fas ligand of the TNF family through their death domain containing receptors, TNF-R1 and Fas. Several death receptors including DR3, DR4, DR5, and DR6 have been identified. Like TNF-R1, DR6 (also known as TNFRSF21) interacts with death domain containing adapter molecule TRADD. Overexpression of DR6 induces apoptosis and activates NF-B and JNK. DR6 is widely expressed in human tissues and cell lines (2). Recently, DR6 was found to interact with an amino-terminal fragment of the Beta-amyloid protein (APP) in neurons, activating a caspase 6-dependent apoptotic event leading to axonal degeneration and pruning (3).

Supplier: YSI

The ProSolo handheld represents the evolution of YSI's line of portable Dissolved Oxygen field meters. It replaces the ProODO as YSI's most advanced optical dissolved oxygen field meter and is ideal for a diverse range of applications that include aquaculture, coastal, estuary, wastewater, and wetland sampling.

Supplier: Mettler Toledo

The XPR26PC allows fast and highly accurate pipette verifications according to ISO8655 for volumes between 1 and 100 µl. Supported by status light, level control, and internal calibration, producing reliable results every time.

Supplier: HANNA INSTRUMENTS

This laboratory pH meter delivers precision while offering simplicity and versatility in a sleek design.

Supplier: Thermo Fisher Scientific

The Thermo Scientific™ Orion™ Pro Star EC212 conductivity bench meter is designed to provide accurate, reliable electrochemistry testing. Featuring an intuitive interface, enhanced data reporting and robust functionality, the Orion™ Pro Star EC212 meter delivers advanced performance in a modern and simplified package.

Supplier: Biotium

Lumitein™ is a luminescent dye designed for detecting proteins in SDS polyacrylamide (SDS-PAGE) gels. It can also be used to detect proteins in native PAGE gels after an additional SDS incubation step. The stain combines excellent sensitivity, exceptional user-friendliness and compatibility with common instruments and downstream analysis.

Supplier: Gold Standard Diagnostics

The AIX1000™ is the first FDA cleared, fully automated system for nontreponemal RPR syphilis testing

Supplier: Thermo Fisher Scientific

The Barnstead GenPure Pro water purification systems provide up to 200L/day of Type 1, ultrapure (18.2 megohm) water from pre-treated feed water

Supplier: Prosci

The integrin alpha 4 (also known as CD49d and ITGA4) belongs to the integrin alpha chain family of proteins. Integrins are heterodimeric integral membrane proteins composed of an alpha and beta chains (reviewed in 1). Alpha 4 (α4) chain associates with either beta 1 (β1) or beta 7 (β7) chain. It has been demonstrated that the putative ligand-binding sites of both integrin α4β1 and α4β7 is located on the α4 chain. These ligands included Madcam, VCAM, and fibronectin (2-4). Madcam is known as the principal ligand for integrin a4b7. Recently it was also demonstrated that HIV-1 envelope can mimic Madcam by binding to and signaling though integrin α4β7, the gut mucosal homing receptor for peripheral T cells (5). This recombinant protein fragment includes the ligand and monoclonal antibody binding domains; this binding has been tested and verified in ELISA assays. This recombinant protein is recognized PSI antibodies Integrin 4α (IN1) (PSI 4827) and Integrin 4α (IN2) (PSI 4837), but not Integrin 4α (CT) (PSI 4783).

Supplier: Prosci

Interleukin-33 (IL-33) is a recently identified member of the IL-1 family of cytokines whose other members include IL-1, IL-1Ra and IL-18 (1,2). Its receptor has been shown to be ST2, an IL-1 receptor family member that also acts as a negative regulator of TLR-IL-1R signaling (1,3) and IL-1R accessory protein (IL-1RAcP) (4). Receptor binding of IL-33 activates NF-B and MAP kinases and induces the expression of TH2-associated cytokines such as IL-4, IL-5 and IL-6. Prolonged IL-33 treatment of mice led to the development of eosinophilia, splenomegaly, and severe pathological changes in mucosal organs such as lungs, esophagus and small intestine (2). Recent experiments have shown that IL-33 can also co-localize with heterochromatin and possesses transcriptional repressor activities, indicating that IL-33 may function as both a proinflammatory cytokine and an intracellular nuclear factor with transcriptional regulatory properties (5).

Supplier: Invitrogen

Pierce Silver Stain for Mass Spectrometry is a complete kit for rapid and ultra-sensitive silver staining of proteins in polyacrylamide gels and efficient destaining of excised gel pieces for mass spectrometry analysis. This kit enables both first-time and experienced users to achieve consistent and reliable staining using high-, low-, and gradient-percentage gels in 1D and 2D formats. The optimized staining method ensures extremely sensitive staining while minimizing covalent crosslinking of protein to the gel matrix, which can inhibit protein recovery. The destaining reagents facilitate complete removal of silver from stained protein bands and maximum protein recovery for subsequent mass spectrometry analysis.

Supplier: Harvard Apparatus

ECM 2001+ instruments offer best-in-class features for cell fusion and transfection applications.

Supplier: VWR

The VWR® PCR thermal cycler XT⁹⁶ combines industry-inspired innovation with the reliable quality of German manufacturing – housing both in a compact, low noise ventilation design that fits on virtually any bench top. For optimising PCR's, the XT⁹⁶ is also available with a gradient function.
The VWR® PCR thermal cycler XT⁹⁶ offers a powerful, yet easy to use software interface, as well as a host of other innovative features.

Supplier: Prosci

Apoptosis plays a major role in normal organism development, tissue homeostasis, and removal of damaged cells. Disruption of this process has been implicated in a variety of diseases such as cancer (reviewed in 1). Apoptosis is induced by certain cytokines including TNF and Fas ligand of the TNF family through their death domain containing receptors, TNF-R1 and Fas. Several death receptors including DR3, DR4, DR5, and DR6 have been identified. Like TNF-R1, DR6 (also known as TNFRSF21) interacts with death domain containing adapter molecule TRADD. Overexpression of DR6 induces apoptosis and activates NF-kB and JNK. DR6 is widely expressed in human tissues and cell lines (2). Recently, DR6 was found to interact with an amino-terminal fragment of the Beta-amyloid protein (APP) in neurons, activating a caspase 6-dependent apoptotic event leading to axonal degeneration and pruning (3). The doublet observed in the SDS-PAGE is likely due to incomplete removal of the signal sequence.

Supplier: Prosci

IL-16 was initially identified as a chemotactic cytokine (1), but is now known to possess a wide range of activities. Later studies have more fully characterized IL-16 as an immunomodulatory cytokine that contributes to the regulatory process of CD4+ T cell recruitment and activation at sites of inflammation in association with asthma and several autoimmune diseases (2). The precursor of IL-16 (pro-IL-16) is thought to be cleaved towards the C-terminal region by Caspase-3, releasing a 20 kDa active form that binds to and signals through CD4 (3,4). Besides acting as a chemotactic cytokine, IL-16 is thought to also be involved in the regulation of T cell proliferation (5) and multiple infectious, immune-mediated, and autoimmune inflammatory disorders including irritable bowel syndrome, systemic lupus erythematosus, and neurodegenerative disorders (6). At least two isoforms of IL-16 are known to exist; the longer isoform (also known as NIL-16) is detected only in neurons of the cerebellum and hippocampus (7). This recombinant protein fragment is derrived from this longer isoform.

Supplier: Alkali Scientific

Prepare your buffers easily with QuickSilver™ buffer powder, ensuring high-quality solutions for your laboratory experiments.

Supplier: LGC Standards

TRC Paraffin Wax

Supplier: Thermo Fisher Scientific

The Barnstead MicroPure water purification systems provides up to 15L/day of Type 1, ultrapure (18.2 megohm) water from pre-treated feed water. All MicroPure systems include:feed water monitoring to protect your consumables, quick discconnects to make changing consumables easy, and all core consumables and tubing. MicroPure-ST systems come standard with a 6 liter integrated feed tank for labs that do not have a ready supply of pre-treated feed water.

Supplier: Thermo Fisher Scientific

Accurately monitor conductivity, TDS, salinity, resistivity, and temperature with the Orion™ Star™ A322 Conductivity Portable Meter for challenging field tests.

Supplier: Prosci

The pro-inflammatory cytokine IL-1 induced cellular response requires IL-1 receptor complex including IL-1RI and IL-1RAcP. MyD88 has been identified as an adapter molecule in the IL-1 signaling pathway (1). MyD88 associates with and recruits IRAK to the IL-1 receptor complex in response to IL-1 treatment and dominant negative form of MyD88 attenuates IL-1R-mediated NF-B activation. MyD88 is also employed as a regulator molecule by IL-18 receptor and human Toll receptor (2,3), which are members in the Toll/IL-1R family of receptors. Targeted disruption of the MyD88 gene results in lose of cellular responses to IL-1 and IL-18, and MyD88-deficient mice lack responses to bacterial product LPS that employs Toll-like receptors 2 and 4 (TLR2 and TLR4) as the signaling receptors. MyD88 is a general adapter protein for the Toll/IL-1R family of receptors and plays an important role in the inflammatory response induced by cytokines IL-1 and IL-18 and endotoxin. MyD88 gene is expressed in many tissues.

Supplier: Prosci

Interleukin-33 (IL-33) is a recently identified member of the IL-1 family of cytokines whose other members include IL-1, IL-1Ra and IL-18 (1,2). Its receptor has been shown to be ST2, an IL-1 receptor family member that also acts as a negative regulator of TLR-IL-1R signaling (1,3) and IL-1R accessory protein (IL-1RAcP) (4). Receptor binding of IL-33 activates NF-B and MAP kinases and induces the expression of TH2-associated cytokines such as IL-4, IL-5 and IL-6. Prolonged IL-33 treatment of mice led to the development of eosinophilia, splenomegaly, and severe pathological changes in mucosal organs such as lungs, esophagus and small intestine (2). Recent experiments have shown that IL-33 can also co-localize with heterochromatin and possesses transcriptional repressor activities, indicating that IL-33 may function as both a proinflammatory cytokine and an intracellular nuclear factor with transcriptional regulatory properties (5). This recombinant protein represents the cleaved and presumably activated form of IL-33, but has not been tested in any biological assays.

Supplier: Thermo Fisher Scientific

The Barnstead GenPure xCAD Plus water purification systems provides up to 200L/day of Type 1, ultrapure (18.2 megohm) water from pre-treated feed water

Supplier: Thermo Fisher Scientific

The Orion™ Pro Star PC215 pH/ion and conductivity bench meter is designed to provide accurate, reliable electrochemistry testing. Featuring an intuitive interface, enhanced data reporting and robust functionality, the Orion™ Pro Star PC215 meter delivers advanced performance in a modern and simplified package.

Supplier: Prosci

Influenza A virus is a major public health threat, killing more than 30,000 people per year in the USA (1). Novel influenza virus strains caused by genetic drift and viral recombination emerge periodically to which humans have little or no immunity, resulting in devastating pandemics. Influenza A can exist in a variety of animals, but it is in birds that all subtypes can be found (2). These subtypes are classified based on the combination of the virus coat glycoproteins hemagglutinin (HA) and neuraminidase (NA) subtypes. HA interacts with host cell surface proteins containing oligosaccharides with terminal sialyl residues. Its extracellular region has two domains (HA1 and HA2); HA1 is cleaved from the main hemagglutinin protein by the host immune system. During 1997, an H5N1 avian influenza virus was determined to be the cause of death in 6 of 18 infected patients in Hong Kong (3). This more recent virulent strain of H5N1 is now seen in Africa and Europe, as well as in Southeast Asia. There is some evidence of human to human spread of this virus, but it is thought that the efficiency of this type of transmission is low (4). Virus isolated from a human infected with the H5N1 strain in 1997 could bind to oligosaccharides from human as well as avian sources, indicating its species-jumping ability (5). This HA1 recombinant protein is recognized by several ProSci hemagglutinin antibodies.

Supplier: Omega Bio-Tek

The Mag-Bind® Endo-free Plasmid Mini Kit is designed to deliver high-quality, plasmid DNA with endotoxin levels <0.1 EU/μg for use in eukaryotic transfections and other sensitive in vitro applications.