Substrati enzimatici

<p>Aldol® 518 alpha-D-galactopyranoside is a chromogenic and fluorogenic enzyme substrate used for detection of alpha-galactosidase activity. The enzyme substrate is cleaved by alpha-galactosidase positive bacteria and yeasts in liquid or solid media, yielding red color and red fluorescence signal. Aldol® 518 alpha-D-galactopyranoside can also be used to detect alpha-galactosidase (encoded by the Mel1 gene) in yeast gene reporter assays or for identification of alpha-gal positive transformants on agar plates. Aldol® 518 alpha-D-galactopyranoside can be used under aerobic and anaerobic conditions.</p>

<p>5-Bromo-6-chloro-3-indoxyl butyrate is a chromogenic substrate that yields a magenta-colored product after cleavage. The chromophore 5-bromo-6-chloro-indoxyl is released, generating the observable color. It is used in lipid digestion assays.</p>

<p>L-Lysine 7-amido-4-methylcoumarin, acetate salt is a fluorogenic peptide substrate for aminopeptidase. This AMC peptide substrate is normally used to rapidly profile the N-terminal specificity of proteases.</p>

<p>Chromogenic substrate for beta-glucuronidase</p>

<p>8-Hydroxyquinoline-beta-D-glucuronic acid, sodium salt is a fluorogenic substrate that can be used for enzymatic detection of peroxidase. The substrate is available in a variety of forms, including powder and liquid. This product has been tested for environmental and bioluminescence activity, as well as food safety. It has also been shown to be a useful ligand in immunoassays.</p>

<p>4-Nitrophenyl 2-acetamido-3-O-[2-O-a-L-fucopyranosyl-b-D-galactopyranosyl)-2-deoxyb-D-galactopyranoside is a water soluble, fluorescent probe that can be used for detecting the presence of β-(1→4) -linked galactosaminoglycans. The dye is a substrate for enzymes such as α--mannosidase, β--glucuronidase and β--galactosidase. The dye is also an excellent ligand for lectins such as concanavalin A and wheat germ agglutinin. This product is a diagnostic reagent that has been shown to have high purity and quality. It has CAS No. 93496-53-8 and can be used in food testing, bioluminescence, environmental testing, or high purity applications.</p>

<p>Hippurate hydrolase is an enzyme that catalyzes the hydrolysis of hippurate to glycine and taurine. It is a fluorogenic substrate with high purity, ligand, and high quality. Hippurate hydrolase is used as a diagnostic enzyme for detecting the presence of hippuric acid in urine. This enzyme can be conjugated to a variety of molecules, including fluorophores, biotin or haptens, for use in immunoassay or other applications.</p>

<p>4-Methylumbelliferyl-beta-D-fucopyranoside is a fluorogenic substrate for beta-fucosidase. After enzymatic cleaveage, free 4-methylumbelliferone (also known as hymecromone) is released, exhibiting blue fluorescence upon excitation with UV light. The strongest fluorescence of 4-methylumbelliferone requires deprotonation of the hydroxyl group (thus requires alkaline pH), with a maximal fluorescence intensity obtained with excitation at 350 to 370 nm and emission at 440 to 470 nm. The use of 4-methylumbelliferyl-beta-D-fucopyranosideas a substrate for measuring the beta-fucosidase activity is used for the diagnosis of fucosidosis and the study of glycoprotein metabolism disorder.</p>

<p>5-Bromo-6-chloro-3-indolyl a-D-galactopyranoside is a chromogenic substrate that yields a magenta-colored product after cleavage. The chromophore 5-bromo-6-chloro-indoxyl is released, generating the observable color. It is used in glycolipid metabolism studies.</p>

<p>Resorufin b-D-xylobioside is a fluorogenic substrate for xylanases useful for xylanase activity assays.</p>

<p>Coelenterazine and its derivatives spontaneously complex with aequorin to develop a Ca2+-dependent fluorescent signal.</p>

<p>Aldol® 484 acetate is a chromogenic substrate for carboxylesterases yielding a red precipitate. In contrast to classical indoxyl substrates, Aldol® substrates can be used under aerobic and anaerobic conditions.</p>

<p>Chromogenic substrate targeting alpha-L-arabinofuranosidase</p>

<p>2-Chloro-4-nitrophenyl alpha-D-mannopyranoside is a substrate used to measure the alpha-mannosidase activity. This enzyme plays a crucial role in the lysosomal degradation of asparagine-linked carbohydrate cores of glycoproteinsis. The use of 2-Chloro-4-nitrophenyl alpha-D-mannopyranoside in diagnostic assays is important as a deficiency in alpha-mannosidase leads to the accumulation of mannose-rich oligosaccharides in lysosomes, causing a range of health problems collectively known as alpha-mannosidosis.</p>

<p>A fluorogenic substrate for detection of enzymatic activity of the SARS-CoV-2 Mpro protease. The fluorophore 7-Amino-4-methylcoumarin (AMC) is linked to the tetrapeptide via a peptide bond at the C-terminal of the glutamine residue. Following the hydrolytic activity of the Mpro protease, the fluorogenic AMC group get released from the substrate, generating a fluorescent signal (Ex 380 nm / Em 455 nm).</p>

<p>4-Methylumbelliferyl 2-acetamido-2-deoxy-alpha-D-glucopyranoside-6-sulfate potassium is a fluorogenic substrate for N-acetylglucosamine-6-sulfatase. After enzymatic cleaveage, free 4-methylumbelliferone (also known as hymecromone) is released, exhibiting blue fluorescence upon excitation with UV light. The strongest fluorescence of 4-methylumbelliferone requires deprotonation of the hydroxyl group (thus requires alkaline pH), with a maximal fluorescence intensity obtained with excitation at 350 to 370 nm and emission at 440 to 470 nm. The use of 4-methylumbelliferyl 2-acetamido-2-deoxy-alpha-D-glucopyranoside-6-sulfate potassiumas a substrate for measuring the N-acetylglucosamine-6-sulfatase activity is used for screening of Mucopolysaccharidosis IIID (MPS IIID) (a rare lysosomal storage disorder) and Sanfilippo D syndrome diagnosis.</p>

<p>Resorufin-beta-D-glucuronic acid, sodium salt is a fluorogenic substrate that can be used in diagnostic applications. It is a conjugate of resorufin and beta-D-glucuronic acid. The enzyme substrate reacts with the enzyme luciferase to produce light. The high purity and quality of this product make it ideal for use in the detection of the presence of glucose in urine, which can be used to diagnose diabetes mellitus.</p>

<p>Chromogenic α-maltosidase substrate yielding a yellow solution upon cleavage.</p>

<p>Glutaryl-glycyl-L-arginine 7-amido-4-methylcoumarin hydrochloride is a synthetic peptide substrate used as a fluorogenic substrate for aminopeptidase.</p>

<p>6'-(Diethylamino)spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3'-yl b-D-glucopyranoside is a fluorogenic substrate that is used in diagnostic applications. It has been shown to be a useful ligand for the determination of enzyme activity, and it can also be used to detect bacterial culture media contaminants. 6'-(Diethylamino)spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3'-yl b-D-glucopyranoside is used as an enzyme substrate in chemiluminescent assays, and with other reagents, it can be used for the detection of environmental contaminants. This product has a CAS number of 55426-02-8 and can be found on the website www.sigmaaldrich.com/catalog/product</p>