17877 Results for: "Benzyltributylammonium+bromide&pageNo=30&view=list"

Supplier: ProSci Inc.

Growth hormone (GH), also known as somatotropin (or as human growth hormone [hGH or HGH] in its human form), is a peptide hormone that stimulates growth, cell reproduction, and cell regeneration in humans and other animals. It is thus important in human development. It is a type of mitogen which is specific only to certain kinds of cells. Growth hormone is a 191-amino acid, single-chain polypeptide that is synthesised, stored, and secreted by somatotropic cells within the lateral wings of the anterior pituitary gland.

GH is a stress hormone that raises the concentration of glucose and free fatty acids. It also stimulates production of IGF-1.

The major isoform of the human growth hormone is a protein of 191 amino acids and a molecular weight of 22,124 daltons. The structure includes four helices necessary for functional interaction with the GH receptor. It appears that, in structure, GH is evolutionarily homologous to prolactin and chorionic somatomammotropin. [Wiki].

Supplier: ProSci Inc.

Recognises a protein of 480 kDa, which is identified as FAT2. The cadherins represent a family of Ca2+-dependent adhesion molecules that function to mediate cell-to-cell binding that is critical for the maintenance of structure and morphogenesis. Cadherins each contain a large extracellular domain at the N-terminus, which is characterised by a series of five homologous repeats, the most distal of which is thought to be responsible for binding specificity. The relatively short C-terminal intracellular domain interacts with a variety of cytoplasmic proteins, including beta-catenin, to regulate cadherin function. The cadherin superfamily includes cadherins, protocadherins, desmogleins and desmocollins. FAT2 (FAT tumor suppressor homolog 2) is a single-pass type I membrane protein that belongs to the protocadherin subfamily of cadherins. FAT2 contains one Laminin G-like domain, two EGF-like domains and 32 cadherin domains and is believed to function as a cell adhesion molecule, controlling cell proliferation and playing an important role in cerebellum development.

Supplier: LEICA MICROSYSTEMS

Reliable, reproducible, advanced cell checks. Make your cell culture experiments more reliable and consistent with AI-powered algorithms and analysis.

Supplier: Sartorius Balances

The Cubis® II range has a modular design that to allows the customer to choose the components that suit the application area that is of interest. For the customer, this configurable concept delivers quality weighing, together with a high degree of flexibility, without having to invest in expensive equipment that has features that may never be required.

Supplier: VWR Collection

These compressor-cooled incubators provide a temperature range between 3 to 70 °C with forced air convection and fan speed control (50 to 100%). Featuring a stainless steel (DIN 1.4016) inner chamber and stainless-steel linen finish exterior. The PREMIUM models have an intuitive menu and user-friendly software, USB port with flash drive for data download to USB stick and for uploading programs. They can be connected to Ethernet or Wi-Fi networks for remote control from any computer, and users can receive notifications about selectable parameters via e-mail.

Supplier: ProSci Inc.

Multiple isoelectric variants of calponin have been identified, however only two molecular weight isoforms exist; a 34 kDa form and a 29 kDa form. Expression of the 29 kDa form, I-calponin, is primarily restricted to muscle of the urogenital tract, whereas the higher molecular weight variant has been demonstrated in vascular and visceral smooth muscle. In Western blotting, this mAb reacts with only the 34 kDa form of calponin in extracts of human aortic medial smooth muscle and is unreactive with fibroblast extracts of cultivated human foreskin. Calponin is a calmodulin, F-actin and tropomyosin binding protein, which is thought to be involved in the regulation of smooth muscle contraction. Calponin expression is restricted to smooth muscle cells and has been shown to be a marker of the differentiated (contractile) phenotype of developing smooth muscle.

Supplier: ProSci Inc.

Recognises a 485 amino acid protein (55 kDa monomer/110 kDa homodimer), identified as platelet-derived endothelial growth factor (PD-ECGF), also called Thymidine Phosphorylase (TP, Tymp) or Gliostatin. In the presence of inorganic orthophosphate, it catalyses the reversible phospholytic cleavage of thymidine and deoxyuridine to their corresponding bases and 2-deoxyribose-1-phosphate. It is both chemotactic and mitogenic for endothelial cells and a non-heparin binding angiogenic factor present in platelets. Its enzymatic activity is crucial for angiogenic activity (metabolite is angiogenic). Higher levels of serum TP/PD-ECGF are observed in cancer patients. It is also involved in transformation of fluoropyrimidines, cytotoxic agents used in the treatment of a variety of malignancies, into active cytotoxic metabolites (e.g. 5 -deoxy-5-fluorouridine to 5-FU). High intra-cellular levels of TP/PD-ECGF are associated with increased chemosensitivity to such antimetabolites.

Supplier: ProSci Inc.

This mAb reacts with human Toll-like receptor 2 (TLR4). It is a member of the Toll-like receptor (TLR) family, which plays a fundamental role in pathogen recognition and activation of innate immunity. TLRs are highly conserved from Drosophila to humans and share structural and functional similarities. They recognize pathogen-associated molecular patterns that are expressed on infectious agents, and mediate the production of cytokines necessary for the development of effective immunity. The various TLRs exhibit different patterns of expression. This receptor has been implicated in signal transduction events induced by lipopolysaccharide (LPS) found in most gram-negative bacteria. Mutations in this gene have been associated with differences in LPS responsiveness. Multiple transcript variants encoding different isoforms have been found for this gene.

Supplier: Thermo Orion

These pH electrodes with semi-micro tip are ideal for use in clinical, pharmaceutical, and food labs, wherever sample size is a constraint. Compared to conventional electrodes, the proven ROSS reference system exhibits superior stability in measurements, faster response, greater accuracy and precision when measuring samples that vary in temperature or when calibrating in temperatures that differ from the samples.

Supplier: ProSci Inc.

TRIM30 Antibody: TRIM30 belongs to a family of the tripartite motif (TRIM) proteins involved in the regulation of cell proliferation, differentiation, development, oncogenesis, apoptosis and antiviral responses. The TRIM protein family is an expanding family of RING ('really interesting new gene') proteins, also known as RBCC proteins as they contain an RBCC motif, which comprises a RING domain, one or two B-boxes and a predicted coiled-coil region. Studies have shown that some TRIM family members are critical to innate immunity; TRIM5, TRIM19 and TRIM25, for example, have been shown to restrict viral infection. A recent study shows that TRIM30 functions as a negative modulator of the TLR signaling pathway, by targeting TAB2 and TAB3, and contributes to the inhibition of TLR-mediated NF-kappa B activation. The importance of TRIM30 in the attenuation or termination of NF-kappa B activation suggests that targeting of TAB2 and TAB3 by TRIM30alpha may be a mechanism for modulating many types of immune responses.

Supplier: Thermo Orion

This top performance pH electrode can be used to precisely perform pH determinations. Compared to conventional electrodes, the proven ROSS reference system exhibits superior stability in measurements, faster response, greater accuracy and precision when measuring samples that vary in temperature or when calibrating in temperatures that differ from the samples.

Supplier: Merck

The Simplicity® portable water purification system can be located anywhere in your laboratory. It requires no special installation, no water feed connection and produces ultrapure water on demand from pretreated water (Elix® system, distilled, deionised or reverse osmosis water). The Simplicity® system is an economical alternative for laboratories that currently use bottled water. Simplicity® ultrapure water, produced and used at the point-of-use, is not subject to the degradation and contamination that affects bottled water. The intuitive colour graphic display of the Simplicity® system means that the user can instantly see all system parameters, including water quality, reservoir level and whether the cartridge needs replacing. Type I ultrapure water for scientists who require less than 5 litres per day.

Supplier: SGI - DNA Synthetic Genomics

The Gibson Assembly® HiFi 1 Step Kit provides a simple and effective method to seamlessly construct synthetic genes, genetic pathways, as well as entire genomes. This method allows researchers to achieve complex assembly of large DNA constructs, with multiple inserts, in 1 hour.

Supplier: ProSci Inc.

TRIM30 Antibody: TRIM30 belongs to a family of the tripartite motif (TRIM) proteins involved in the regulation of cell proliferation, differentiation, development, oncogenesis, apoptosis and antiviral responses. The TRIM protein family is an expanding family of RING ('really interesting new gene') proteins, also known as RBCC proteins as they contain an RBCC motif, which comprises a RING domain, one or two B-boxes and a predicted coiled-coil region. Studies have shown that some TRIM family members are critical to innate immunity; TRIM5, TRIM19 and TRIM25, for example, have been shown to restrict viral infection. A recent study shows that TRIM30 functions as a negative modulator of the TLR signaling pathway, by targeting TAB2 and TAB3, and contributes to the inhibition of TLR-mediated NF-kappa B activation. The importance of TRIM30 in the attenuation or termination of NF-kappa B activation suggests that targeting of TAB2 and TAB3 by TRIM30 alpha may be a mechanism for modulating many types of immune responses.

Supplier: HAMILTON BONADUZ

These syringes are the Gastight® version of the original 700 series syringes and are ideal for dispensing volumes from 1 µl up to 500 µl.

Supplier: ProSci Inc.

This antibody recognises proteins of 80-200 kDa, identified as different members of CEA family. CEA is synthesised during development in the fetal gut and is re-expressed in increased amounts in intestinal carcinomas and several other tumors. This mAb reacts with nonspecific cross-reacting antigen (NCA) and shows a cross-reaction with human polymorphonuclear leucocytes. It shows no reaction with a variety of normal tissues and is suitable for staining of formalin/paraffin tissues. CEA is not found in benign glands, stroma, or malignant prostatic cells. Antibody to CEA is useful in detecting early foci of gastric carcinoma and in distinguishing pulmonary adenocarcinomas (60-70% are CEA+) from pleural mesotheliomas (rarely or weakly CEA+). Anti-CEA positivity is seen in adenocarcinomas from the lung, colon, stomach, esophagus, pancreas, gallbadder, urachus, salivary gland, ovary, and endocervix.

Supplier: ProSci Inc.

Tumor Necrosis Factor Alpha (TNF alpha) is a cytokine that binds to TNFRSF1A/TNFR1 and TNFRSF1B/TNFBR. It is mainly secreted by macrophages and can induce cell death of certain tumor cell lines. It is potent pyrogen causing fever by direct action or by stimulation of interleukin-1 secretion and is implicated in the induction of cachexia, Under certain conditions it can stimulate cell proliferation and induce cell differentiation. Impairs regulatory T-cells (Treg) function in individuals with rheumatoid arthritis via FOXP3 dephosphorylation. Upregulates the expression of protein phosphatase 1 (PP1), which dephosphorylates the key 'Ser-418' residue of FOXP3, thereby inactivating FOXP3 and rendering Treg cells functionally defective. Key mediator of cell death in the anticancer action of BCG-stimulated neutrophils in combination with DIABLO/SMAC mimetic in the RT4v6 bladder cancer cell line. [UniProt].

Supplier: ProSci Inc.

At least five CD1 genes (CD1a, b, c, d, and e) are identified. CD1 proteins have been demonstrated to restrict T cell response to non-peptide lipid and glycolipid antigens and play a role in non-classical antigen presentation. CD1a is a non-polymorphic MHC Class 1 related cell surface glycoprotein, expressed in association with Beta-2 microglobulin. Anti-CD1a labels Langerhans cell histiocytosis (Histiocytosis X), extranodal histiocytic sarcoma, a subset of T-lymphoblastic lymphoma/leukemia, and interdigitating dendritic cell sarcoma of the lymph node. When combined with antibodies against TTF-1 and CD5, anti-CD1a is useful in distinguishing between pulmonary and thymic neoplasms since CD1a is consistently expressed in thymic lymphocytes in both typical and atypical thymomas, but only focally in 1/6 of thymic carcinomas and not in lymphocytes in pulmonary neoplasms. Anti-CD1a is reported to be a new marker for perivascular epithelial cell tumor (PEComa).

Supplier: ProSci Inc.

Desmosomes are intercellular adhering junctions that represent cell surface attachment sites for intermediate filament. The desmosome is subdivided into two regions. The plaque region lies adjacent to the plasma, and is believed to contain molecules that attach the intermediate filament cytoskeleton to the desmosome. The core region is composed of transmembrane glycoproteins that are thought to mediate cell-cell adhesion. Desmogleins and desmocollins are the main desmosomal transmembrane proteins. These desmosomal glycoproteins belong to the members of the cadherin family of adhesion molecules. Three different isoforms of both desmogleins and desmocollins have been identified, named as desmoglein 1-3 and desmocollins. Desmosomal cadherins showed differentiation-specific expression in the human epidermis, although the functional significance of this differential expression is not fully understood. Desmocollin-1 can be found in the upper layers. The expression of Desmocollin-2 varies in the basal and suprabasal layers. And Desmocollin-3 is expressed more evenly throughout the suprabasal layers.

Supplier: ProSci Inc.

CD8 is a cell surface receptor expressed either as a heterodimer with the CD8 beta chain (CD8 alpha/beta) or as a homodimer (CD8 alpha/alpha). A majority of thymocytes and a subpopulation of mature T cells and NK cells express CD8a. CD8 binds to MHC class 1 and through its association with protein tyrosine kinase p56lck plays a role in T cell development and activation of mature T cells. For mature T-cells, CD4 and CD8 are mutually exclusive, so anti-CD8, generally used in conjunction with anti-CD4. It is a useful marker for distinguishing helper/inducer T-lymphocytes, and most peripheral T-cell lymphomas are CD4+/CD8-. Anaplastic large cell lymphoma is usually CD4+ and CD8-, and in T-lymphoblastic lymphoma/leukemia, CD4 and CD8 are often co-expressed. CD8 is also found in littoral cell angioma of the spleen.

Supplier: Greiner Bio-One

VACUETTE® tubes contain sodium citrate solutions in concentrations of 3,2% or 3,8% and are used for assays in haemostaseology. The mixing of 9 parts blood to 1 part sodium citrate takes place immediately after the blood is drawn by inverting the tube, causing anticoagulation through the binding of calcium.

Supplier: G-Biosciences

This lab activity is designed to study highly specific lock-key matching properties of antigen-antibody and how this highly specific interaction can be exploited as a tool for research and analysis. This study involves the use of an immunodiffusion technique in which antigen and antibody are allowed to diffuse in a solid agarose medium. When antigen and antibody meet, antigen-antibody complex is formed, which leads to precipitation. Antigen-antibody precipitate is formed in the zone where the concentration of the two matching pairs reaches an optimal known as the zone of equivalence, which results in formation of a visible opaque precipitate region in agarose medium. Those regions of precipitation can be used for determination of concentration or titer of both antigen and antibody. This Antigen-Antibody Interaction kit is a hands-on study of both Ouchterlony Double Diffusion and Radial Immunodiffusion techniques. This kit also provides additional guidance materials for teaching other types of antigen-antibody interactions concepts such as immunoelectrophoresis and immunoprecipitation.

Supplier: VWR Chemicals

Dependable isolation of high quality total cellular DNA from a variety of plant species and tissues. peqGOLD homogeniser columns remove cell debris and improve sample handling following lysis.

Supplier: Biotium

Phalloidin is a toxin isolated from the deadly Amanita phalloides mushroom. It is a bicyclic peptide that binds specifically to F-actin. Fluorescent conjugates of phalloidin are convenient tools to investigate the distribution of F-actin in fixed and permeabilised cells or tissue sections. One unit (U) of phallodin is sufficient to stain one sample (200 µl staining volume). A highly selective actin filament stain for fixed and permeabilised cells. Labeled phalloidins have similar affinity for both large and small filaments.

Supplier: VWR Chemicals

VWR® dehydrated culture media that has been granulated offers both convenience and safety benefits. The correct dissolution of culture media is critical to achieving the best performance. Granulated culture media saves time in the preparation of ready to use culture media. In addition, granulation reduces dust generation, so handling the product is more pleasant and safer for the user, making it a much cleaner and safer working environment.

Supplier: VWR Collection

VWR® has expanded the VWR® carboy features and benefits by offering the Versatile Cap, Versatile Barb and state-of-the-art Spigot technology. These three components complement a wide array of applications supported by the VWR® Carboy. The leakproof cap insert with replaceable gasket enable users to quickly change the top connector of each carboy to match the application needs. Versatile Cap is stackable and is offered in both 83 mm (compatible with most industry carboys) and a 120 mm extra wide-mouth version that fits exclusively on VWR® 20 L and 40 L extra wide mouth carboys. To see homogenisation of solutions, closed adapter inserts with a clear window are available. Quick connect options are also a part of the many capabilities of this Versatile Cap technology. This includes quick-connect port combinations of two, three, and four. For bottom tubulation, Versatile Barb is used to replace the spigot and support flexibility in drainage, connection to a pump or automated equipment, or connection to a filling bell. Sanitary fitting connector is also available in order to enable the carboy to be used as a supply reservoir to a larger system.

Supplier: SIGMA ALDRICH MICROSCOPY

CC/mount is an aqueous based permanent mounting medium with a very high refractive index, which when applied to the stained tissue sections can store the tissue specimens permanently without the fading of the chromogens. Because of the superior refractive index of CC/mount, tissues mounted in this medium look like specimens mounted with organic based mounting media. No coverslipping is required with CC/mount. However, if coverslipping is required, dried CC/mount can be post mounted by using an organic based mounting medium. CC/mount permits the long-term storage of antigens localised using organic insoluble chromogen substrates, including AEC, DAB, Fast Red, BCIP/NBT, BCIP/INT and fluorescent dyes like FITC and phycobiliproteins. The high pH of CC/mount ensures increased stability of fluorescence intensity.

Supplier: VWR Chemicals

Purification of single- or double-stranded DNA from PCR or other enzymatic reactions.

Supplier: VWR Collection

VWR® Fluorometer for quantitation of DNA, RNA, and Proteins. Compact with touch screen control panel. Compatible with VWR® quantitation kits and kits from leading suppliers. Excitation: Blue 460 to 480 nm, Red 630 to 650 nm; Emission: Green 500 to 535 nm, Red 670 to 710 nm. 100 to 240 VAC.

Supplier: ProSci Inc.

Keratins are a family of intermediate filament proteins that assemble into filaments through forming heterodimers of one type I keratin (keratins 9 to 23) and one type II keratin (keratins 1 to 8). Keratins demonstrate tissue and differentiation specific expression profiles. Keratin 15 is a type I keratin which is expressed only in basal keratinocytes in stratified epithelia and does not appear to have a natural type II expression partner. Keratin 15 is down regulated in activated keratinocytes. Cytokeratin 15 is a specific marker of stem cells of the hair-follicle bulge and may be a useful marker for diagnosis between basal cell carcinoma (BCC) and trichoepithelioma. Trichoblastoma are benign neoplasms of follicular differentiation frequently found in nevus sebaceous. Many morphologic features are shared with nodular basal cell carcinoma, sometimes rendering a diagnosis difficult. Trichoblastoma and BCC show variable expression of Cytokeratin 15 and Cytokeratin 19, and absence of hair keratins.