Glicoscienza

<p>GloboH-pentanyl backbone for incorporation onto peptide or conjugated to protein</p>

<p>Lactose is the principal sugar in human and most other mammalian milks, ( 4-O-(β-d-galactopyranosyl)-d-glucopyranose) (Collins, 2006). Lactose undergoes mutarotation; it is a reducing sugar and is significantly less soluble in water than sucrose. Lactose is much less sweet than sucrose (at ~1% about 0.15 (sucrose=1). The enzyme lactase (β-galactosidase), which is present in the small intestine, catalyzes hydrolysis of lactose to form glucose and galactose. Anhydrous lactose is an excipient, filler, diluent, and bulking agent in a wide variety of pharmaceutical tablets, capsules, powders and other preparations. Lactose also has applications as a nutrient and multi-functional ingredient in infant formulae, geriatric, dietetic and health foods (Linko, 1982).</p>

<p>Methyl 2,3-di-O-p-toluenesulfonyl-6-O-trityl-a-D-glucopyranoside is a custom synthesis of a natural product. It is an analogue of the disaccharide sucrose (CAS No. 69649-64-5). Methyl 2,3-di-O-p-toluenesulfonyl 6-[(trityloxy)methyl]-a-(1,2:4,5)-D glucopyranoside reacts with fluoride ion to form methyl 2,3 di -O - p - toluenesulfonyl 6-[(trityloxy)methyl]-a-(1,2:4,5)-D glucopyranoside fluoride ion. The monosaccharides are linked by glycosyl bonds and can be modified by different reactions such as oxidation or reduction. The saccharide can be modified</p>

<p>2-Acetamido-2-deoxy-4-O-(b-D-galactopyranosyl)-D-glucopyranose LacNAc isomer. This compound has been shown to inhibit pro-inflammatory cytokines in human bronchial epithelial cell lines, which may be helpful in treating inflammatory conditions. The compound can be analyzed using high-performance liquid chromatography (HPLC), which separates molecules based on their chemical properties. The acid residues present in the molecule make it an ideal target for antibodies and polymer-based drug delivery systems. In host cells, this compound is involved in various biological processes related to cell adhesion and signaling.</p>

<p>Ethyl 2-acetamido-3,4,6-tri-O-acetyl-2-deoxy-b-D-thioglucopyranoside is a modified carbohydrate that has been synthesized by the click modification of an acetylated triose. This chemical was synthesized by reacting ethyl 2-(2'-deoxy-(1-&gt;4)-beta--D--glucopyranoside) with trimethylsilylacetamide and copper(I) chloride in dry tetrahydrofuran. This product has high purity and is used as a research tool for glycobiology.</p>

<p>4-Methoxyphenyl 2,4,6-tri-O-benzoyl-a-D-mannopyranoside is a glycosylation product of mannose with 4-methoxybenzoic acid. It is a complex carbohydrate that has been modified by methylation and click modification. The fluorination increases the reactivity of the hydroxyl groups on the sugar ring. This product can be synthesized in high purity and custom synthesis.</p>

<p>Glycoside of Sialyl Lewis X</p>

<p>Inhibitor of hexokinase isozymes and cellular glycosylation</p>

<p>3-Deoxy-D-glucose (3DG) is a molecule that belongs to the class of carbohydrates. It is an analog of D-glucose, which is the key substrate for the production of energy in mammalian cells. 3DG has been shown to inhibit the uptake of glucose by trypanosomes and also inhibits glycolysis in mammalian cells. The inhibition of glycolysis may be due to its ability to prevent the phosphorylation of glucose by hexokinase, thus blocking the conversion of glucose into glucose 6-phosphate. 3DG is biosynthesized from d-xylose, which is a five carbon sugar that can be oxidized to form CO2 and H2O.</p>

<p>A fucan sulphate found in brown marine algae (Phaeophyta-typically Fucus vesiculotus, Ascophyllum nodosum, Alaria and Macrocystis pyrifyra (illustrated) and has been shown to have anticoagulant activity. The main constituents are α-1,4 and α-1,2 linked L-fucose sulphates, although galactose also occurs and there are many variations of the basic structure found in different species of Phaeophyta.<br>The fucose content of this fucan is approx. 31% and it also contains galactose (approx. 2.2%), uronic acid (approx. 12.4%) and sulfate (approx. 32.5%).<br>The image was kindly provided by Prof Mike Guiry from Cork who runs ‘The Seaweed Site’.</p>

<p>a-Acetobromo-D-xylose is an oligosaccharide sugar used in glycosylation and polysaccharide modifications. It is synthesized by the fluorination of xylose with acetic acid, bromine, and a base. The product is purified by vacuum distillation and recrystallization. In addition to its use as a carbohydrate, this product can be modified using methylation or click chemistry to create derivatives.</p>

<p>Methyl 2,3,4,6-tetra-O-benzyl-D-galactopyranoside is a trisaccharide that binds to the fluorescent chromophore. It has been shown to have strong binding activity and can be used for the labeling of carbohydrates. Methyl 2,3,4,6-tetra-O-benzyl-D-galactopyranoside is also used in assays to detect toxins or as a fluorescent label for polymers. This compound can be synthesized by reacting methyl 4,6-dibenzyloxybenzoate with glucose in methanol.</p>

<p>Useful oligosaccharide-lipid conjugate for raising antibodies.</p>

<p>Cellobionic acid is produced by oxidative enzymes working on cellulose.  These compounds have found application in cosmetic antiaging formulations, moisturizers, and peels, and in treatment products to improve hyperpigmentation and acne. The bionic acids such as cellobionic acid offer the benefits of α-hydroxyacids without irritation. They also provide additional antioxidant/chelation, barrier strengthening, and moisturizing effects.</p>

<p>1,4-Anhydro-2,O:5,6-di-O-isopropylidene-2-C-(hydroxymethyl)-D-galactitol is a custom synthesis. It is commonly used in the modification of saccharides and oligosaccharides to produce fluorinated derivatives with various functional groups. The preparation of this compound has been described by Click chemistry.</p>

<p>6-O-Methyl-D-galactopyranose is a monosaccharide that is an important component of the glycosidic linkage in the plant galactomannans. 6-O-Methyl-D-galactopyranose has been shown to be a good substrate for immobilized lectin, which can be used in ionization techniques as well as to characterize glycoproteins and glycopeptides. 6-O-Methyl-D-galactopyranose has also been used in the identification of blood groups and amino acid analysis.</p>

<p>Keratin-reducing component in cosmetic applications; used in Glc conjugation</p>

<p>UDP-a-D-galactose disodium salt is a nucleotide sugar that is used in the synthesis of oligosaccharides. It is also used to identify mammalian cells that express UDP-galactose:quinone oxidoreductase, which are responsible for synthesizing the sugar. It is a building block of the influenza virus and has been shown to inhibit viral growth by interfering with RNA synthesis. This compound can be synthesized using solid-phase synthesis or multienzyme strategy.</p>

<p>N-Acetyl D-mannosamine (ManNAc) is an aldohexose (2-acetamido-2-deoxymannose) in which the axial hydroxyl group at position 2 is replaced by a N-acetyl group (Collins, 2006). It has been reported that N-acetyl D-mannosamine supplementation, may provide novel means to break the link between obesity and hypertension (Peng, 2019). N-Acetyl-D-mannosamine and N-acetyl-D-glucosamine are the essential precursors of sialic acid, the specific monomer of polysialic acid, a bacterial pathogenic determinant, for example, Escherichia coli K1 uses both amino sugars as carbon sources. It has been reported that ManNAc can be used as a treatment for hereditary inclusion body myopathy, an adult-onset, progressive neuromuscular disorder and also for renal disorders involving proteinuria and hematuria due to podocytopathy and/or segmental splitting of the glomerular basement membrane (Galeano, 2007).</p>

<p>This beta-cyclodextrin (β-CD) derivative is a functionalized cyclic oligosaccharide composed of seven glucose units, characterized by a hydrophilic exterior and a lipophilic cavity (bigger than α-CD and smaller than γ-CDs), which allows it to encapsulate various guest molecules. This structural feature facilitates its use in multiple applications, including pharmaceuticals, food enhancement, and cosmetics. In the pharmaceutical industry, it enhances the solubility and stability of poorly water-soluble drugs, improving their bioavailability and efficacy while also masking unpleasant tastes. The food sector utilizes it as a stabilizer for flavors, colors, and nutrients, extending shelf life by protecting sensitive ingredients from degradation. In cosmetics, it serves as a complexing agent for fragrances and active components, ensuring their stability and controlled release. Its use expands to many other fields, including nanotechnology for drug delivery systems, environmental remediation for extracting organic pollutants, textiles for slow-release fragrances, and analytical chemistry for chiral separation.</p>