1157 Results for: "NMR"

Supplier: Aladdin Scientific

Complexation of the amino- and carboxyl-protected tripeptide with 3-amino-5-methylpyrazole was studied by low-temperature NMR experiments in a freonic solvent.application:3-Amino-5-methylpyrazole was employed as beta-sheet template to investigate its interaction with ferrocenoyl-dipeptides. It was also used in the synthesis of 4-aryl-3,7,7-trimethyl-2,4,6,7,8,9-hexahydropyrazolo[3,4-b]quinolin-5-ones.

Supplier: Adipogen

Endogenous hydrophilic bile acid. Antioxidant. Cytoprotective against oxidative stress and cell death. Hepatoprotective at cellular and molecular level, including stabilization of membranes. Protects hepatocytes against bile acid-induced apoptosis. Antiapoptotic and antinecrotic. Targets the mitochondrial function and integrity, reduction of endoplasmatic stress and interactions with survival signals in cAMP, Akt, NF-kappaB, MAPK and PI3K signaling pathways. Modulator and finetuner of the p53-Mdm-2 complex. Chemopreventive against colorectal cancer by countering the tumor-promoting effects of secondary bile acids. Shows also effects on epidermal growth factor receptor (EGFR) signaling and COX-2 expression. Immunomodulator and anti-inflammatory compound. Modifies TLR4 and TLR9 signaling pathways and downregulates the production of proinflammatory tumor necrosis factor-alpha (TNF-alpha). Pregnane X receptor agonist. Neuroprotective. Inhibits neuronal apoptosis. Glucocorticoid Receptor (GR) agonist. Anticholestatic agent. Used to reduce cholesterol absorption and for cholesterol gallstone dissolution. Used to treat primary biliary cirrhosis (PBC). Interferes with the progression of non-alcoholic fatty liver disease (NAFLD)/NASH. Reduces CXCR3 expression. TIMP-1 inducer. ADAM17 inhibitor.

Supplier: Aladdin Scientific

2-Cyanobenzoic acid can be prepared from phthalic anhydride. Mass spectrophotometry, NMR, IR are extremely useful techniques to determine the ring-chain tautomeric equilibrium of 2-cyanobenzoic acid in all three phases. The standard (p° = 0.1 MPa) molar enthalpy of formation of 2-cyanobenzoic acid is -(150.7 ±2.0) kJ.mol-1.

Supplier: Intact Genomics

Chemically competent DL39 (DE3) E. coli cells are specific for transformation and protein expression in order to uniformly and specifically label e.g. phenylalanine or leucine residues. DL39 (DE3) can also be used to reduce NMR cross-labeling via. transaminase activity for valine, leucine, isoleucine, aspartate, phenylalanine, tyrosine and tryptophan residues.

Supplier: TCI America

[e.e. Determination Reagent by NMR] CAS Number: 53531-34-3 MDL Number: MFCD00001260 Molecular Formula: C16H11F3O Molecular Weight: 276.26 Purity/Analysis Method: 99.0% (GC) Form: Crystal Color: Slightly Pale Yellow Melting point (°C): 134 Specific rotation [a]20/D: -30.5 deg (C=1, CHCl3)

Supplier: Bachem Americas

Fmoc-(D₄)-Ala-OH was used by Bowman and Zaia in the SPPS of peptide tags for the stable isotopic labeling of carbohydrates which allowed their mass spectroscopic quantification. For ²H-NMR-studies on the influence of Pro on the folding of WALP transmembrane peptides, Koeppe’s group incorporated pairs of deuterated alanines by introducing Fmoc-(D₄)-Ala-OH (60-100%) at selected sequence positions.

Supplier: Adipogen

Hypervalent iodine reagents. Convenient substitute of o-Iodosobenzoic acid (IBA) as an oxidant. Can be used for installations of alpha/beta-unsaturation to carbonyl compounds, oxidations and cyclizations by single-electron transfer processes. Promotes faster reactions than IBA with better solubility in common organic solvents. An attractive feature is the ability to directly measure reactivity by 19F NMR spectroscopy without the use of deuterated solvents.

Supplier: Aladdin Scientific

6-Chloropurine (6-CIPH), a 6-substituted purine derivative, is an antileukemic drug. It can be prepared by the chlorination of hypoxanthine with phosphorus oxychloride in the presence of dimethylaniline. The NMR-based conformational analysis of the products formed during the reaction of 6-CIPH with 3,4-di-O-acetyl-D-xylal and 3,4-di-O-acetyl-L-arabinal have been reported.6-CIPH can undergo palladium-catalyzed cross coupling with organostannanes at 6-position to form the corresponding arylated or alkylated products.

Supplier: Aladdin Scientific

4-Bromo-3-nitrotoluene (2-bromo-5-methylnitrobenzene, 1-bromo-4-methyl-2-nitrobenzene) is a halonitrobenzene. It has been synthesized from 4-methyl-2-nitroaniline and confirmed by 1H NMR. The crystal structure of 1-bromo-4-methyl-2-nitrobenzene is found to be orthorhombic in the Pna21 space group. Its enthalpy of vaporization at boiling point has been determined.4-Bromo-3-nitrotoluene may be used as a starting material in the synthesis of 2-bromo-5-methylaniline and as a reagent in the synthesis of 2-nitro-4:4′-dimethyl-diphenyl by reacting with p-iodotoluene.

Supplier: Bachem Americas

Anticoagulant and antithrombotic peptides. Please see also the product family 'Hirudin Fragments and Analogs', the inhibitors N-1065, N-1215, N-1260, N-1565, and N-1970, and the anticoagulant anisindione, Q-1085.

Supplier: MilliporeSigma

A water soluble, amphiphilic α-helical lipopeptide detergent (LPD) that forms small micelles and effectively mimics lipid bilayers (solubility in PBS ~ 40 mM; micelle MW ~ 23,100; aggregation number ~ 8.1; partial specific volume ~ 0.77 cm3/g). Shown to not only solubilize but also stabilize bacteriorhodopsin, lactose permease and E. coli PagP protein ([LPD] ~ 250 µM and [protein] ~ 22 µM) by forming complexes and precluding aggregation. Useful for NMR and X-ray structural studies of membrane proteins.

Supplier: Aladdin Scientific

Biochemical/physiological effects:β- Galactosidase acts on the ends of disaccharides, glycoconjugates and polysaccharides β- D-galactosyl. It can be used to mediate sugar transfer reactions, such as galactooligosaccharide (GOS) synthesis. ββ- Galactosidase can be used in glycobiology and biotechnology.β- Galactosidase cleaves lactose into monosaccharide components, glucose and galactose. It can also catalyze the transglycosylation of glucose to form isolactose, which acts as β- The inducer of galactosidase.β- Galactosidase (from Aspergillus oryzae) has been used for: ① in vitro nuclear magnetic resonance (NMR); ② As β- Galactosidase analysis standard, determination of cell related β- Galactosidase concentration;③ To modify the sugar residues on the surface of the mutant synovial cells to study the adhesion; ④ Lactase hydrolysis experiment; ⑤ Reverse phase (RP) adsorption experiment; ⑥ Whey lactose hydrolysisProduct characteristics:1. Temperature range: effective temperature range: 20 ℃ - 70 ℃Optimum temperature: 40-60 ℃2. PH range: effective PH range: 2.0-7.5Optimum PH range: 4.0-5.5Enzymology Committee No.: 3.2.1.23Principle: lactase can decompose β- A galactoside bond that produces glucose and galactose.Definition of enzyme activity: 1g lactase decomposes ONPG (o-nitrobenzene) every minute at PH 4.5 and 37 ℃ β- D-galactopyranoside) to produce 1umol ONP (o-nitrophenol), that is, one enzyme activity unit is expressed in u/g.

Supplier: Enzo Life Sciences

The multifunctional, multi-compartmental protein Calreticulin (Crt) functions as a soluble molecular chaperone of new or misfolded proteins as well as a Ca2+-binding protein. Most abundant in the ER lumen, Crt expression also occurs in other membrane-bound organelles, the cell surface, and extracellularly. Also known as CRP-55, calregulin and HACBP (high affinity calcium-binding protein), Crt contains the ER-retrieval sequence, KDEL, and is the soluble paralog of the ER membrane protein Calnexin (Cnx). Crts three domains include a 180 residue N-terminal domain, a proline-rich P-domain (residues 189-288) that binds Ca2+ with high affinity and shares homology with Cnx and calmegin, and a 110 residue C-terminal domain that binds Ca2+ with low affinity but high capacity. The P-domain may interact with the co-chaperone ERp57 (Grp58), a thiol reductase. The NMR structure of the P-domain consists of an extended hairpin that appears to form a curved protrusion from the Crt core domain. Both Crt and its membrane bound homolog CNX interact with proteins and glycoproteins possessing monoglucosylated N-glycans. The Crt/Cnx cycle promotes correct folding, inhibits aggregation of folding intermediates, blocks premature oligomerization, regulates ER degradation, and prevents incompletely folded glycoproteins from exiting to the Golgi complex. Crt also appears to function as an auto-antigen in systemic lupus erythematosus, rheumatoid arthritis, celiac disease, complete congenital heart block, and halothane hepatitis. A diversity of additional functions attributed to Crt includes adhesion, blood function, and cardiac and neuronal development gene expression.

Supplier: Enzo Life Sciences

The multifunctional, multi -compartmental protein Calreticulin (Crt) functions as a soluble molecular chaperone of new or misfolded proteins, as well as a Ca2+-binding protein. Most abundant in the ER lumen, Crt expression also occurs in other membrane-bound organelles, the cell surface, and extracellularly. Also known as CRP-55, calregulin and HACBP (high affinity calcium-binding protein), Crt contains the ER-retrieval sequence, KDEL, and is the solub le paralog of the ER membrane protein Calnexin (Cnx). Crt's three domains include a 180 residue N-terminal domain, a proline-rich Pdomainresidues 189 -288) that binds Ca2+ with high affinity and shares homology with Cnx and calmegin, and a 110 residue C-terminal domain that binds Ca2+ with low affinity but high capacity. The P-domain may interact with the co-chaperone ERp57 (Grp58), a thiol reductase. The NMR structure of the P -domain consists of an extended hairpin that appears to form a curved protrusion from the Crt core domain. Both Crt and its membrane bound homolog CNX interact with proteins and glycoproteins possessing monoglucosylated N -glycans. The Crt/Cnx cycle promotes correct folding, inhibits aggregation of folding intermediates, blocks premature oligomerization, regulates ER degradation, and prevents incompletely folded glycoproteins from exiting to the Golgi complex. Crt also appears to function as an auto-antigen in systemic lupus erythematosus, rheumatoid arthritis, celiac disease, complete congenital heart block, and halothane hepatitis. A diversity of additional functions attributed to Crt includes adhesion, blood function, and cardiac and neuronal development gene expression.

Supplier: Enzo Life Sciences

The multifunctional, multi -compartmental protein Calreticulin (Crt) functions as a soluble molecular chaperone of new or misfolded proteins, as well as a Ca2+-binding protein. Most abundant in the ER lumen, Crt expression also occurs in other membrane-bound organelles, the cell surface, and extracellularly. Also known as CRP-55, calregulin and HACBP (high affinity calcium-binding protein), Crt contains the ER-retrieval sequence, KDEL, and is the solub le paralog of the ER membrane protein Calnexin (Cnx). Crt's three domains include a 180 residue N-terminal domain, a proline-rich Pdomainresidues 189 -288) that binds Ca2+ with high affinity and shares homology with Cnx and calmegin, and a 110 residue C-terminal domain that binds Ca2+ with low affinity but high capacity. The P-domain may interact with the co-chaperone ERp57 (Grp58), a thiol reductase. The NMR structure of the P -domain consists of an extended hairpin that appears to form a curved protrusion from the Crt core domain. Both Crt and its membrane bound homolog CNX interact with proteins and glycoproteins possessing monoglucosylated N -glycans. The Crt/Cnx cycle promotes correct folding, inhibits aggregation of folding intermediates, blocks premature oligomerization, regulates ER degradation, and prevents incompletely folded glycoproteins from exiting to the Golgi complex. Crt also appears to function as an auto-antigen in systemic lupus erythematosus, rheumatoid arthritis, celiac disease, complete congenital heart block, and halothane hepatitis. A diversity of additional functions attributed to Crt includes adhesion, blood function, and cardiac and neuronal development gene expression.

Supplier: Chemglass

TUBE NMR 5MM

Supplier: Chemglass

TUBE NMR 5MM

Supplier: Chemglass

TUBE NMR 3MM

Supplier: Chemglass

TUBE NMR 5MM

Supplier: Chemglass

TUBE NMR 3MM

Supplier: Chemglass

TUBE NMR 3MM

Supplier: Chemglass

TUBE NMR 3MM

Supplier: Chemglass

TUBE NMR 3MM

Supplier: Chemglass

TUBE NMR 3MM

Supplier: Chemglass

TUBE NMR 3MM

Supplier: Chemglass

TUBE NMR 3MM

Supplier: Chemglass

TUBE NMR 5MM

Supplier: Chemglass

TUBE NMR 5MM

Supplier: Chemglass

TUBE NMR 3MM

Supplier: Chemglass

TUBE SAMPLE NMR QUARTZ