نتایج جستجو برای: polygalacturonic acid
تعداد نتایج: 747446 فیلتر نتایج به سال:
negalacturonan (RG) I structure consisting of the diglycosyl repeating unit, -4)-a-D-GaipA-(1.2)-a-LRhap-(1-. The lengths of RG chains were calculated as approximate]y 15, 28, and 100 dig]ycosyl repeats. The RG components linked to each othcr by intcryention of galacturonan (GN) chains, constituting the backbone of SSPS. All arabinose residues, which constitute 21% of total SSPS sugars, were fo...
Endopolygalacturonases I, II and C isolated from recombinant Aspergillus niger strains were characterized with respect to pH optimum, activity on polygalacturonic acid and mode of action and kinetics on oligogalacturonates of different chain length (n = 3-7). Apparent Vmax values using polygalacturonate as a substrate at the pH optimum, pH 4.1, were calculated as 13.8 mukat.mg-1, 36.5 mukat.mg-...
Soluble soybean polysaccharides (SSPS) extracted from soybean cotyledons are acidic polysaccharides, and exhibited a pectin-like structure. After digesting galacturonan with polygalacturonase, two novel galacturonan (GN) fragments, which were directly linked to xylosyl oligosaccharides, were obtained. One consisted of (beta-D-Xyl)7 branched at the C-3 site of 1,4-linked (alpha-D-GalA)4, and the...
OBJECTIVE Cardiovascular diseases constitute the leading cause of mortality worldwide. Calcification of the vessel wall is associated with cardiovascular morbidity and mortality in patients having many diseases, including diabetes mellitus, atherosclerosis, and chronic kidney disease. Vascular calcification is actively regulated by inductive and inhibitory mechanisms (including vascular smooth ...
An N-acetylglucosamine (GlcNAc)/N-acetylneuraminic acid-specific lectin from the fruiting body of Psathyrella velutina (PVL) is a useful probe for the detection and fractionation of specific carbohydrates. In this study, PVL was found to exhibit multispecificity to acidic polysaccharides and sulfatides. Purified PVL and a counterpart lectin to PVL in the mycelium interact with heparin neoproteo...
The alcohol-insoluble fraction from the water extract of tamarind seed meal, constituting 60 to 65 per cent of the husked kernel, has been described as a rich source of pectin (l-3). Although it forms a firm jelly in the presence of appropriate amounts of sugar and acid (1,4) and has been suggested for commercial use as a substitute for pectin (5), it has been shown in preliminary communication...
In response to wounding, a 48-kDa myelin basic protein (MBP) kinase is activated within 2 min, both locally and systemically, in leaves of young tomato plants. The activating signal is able to pass through a steam girdle on the stem, indicating that it moves through the xylem and does not require intact phloem tissue. A 48-kDa MBP kinase is also activated by the 18-amino acid polypeptide system...
Background: The organic matter (OM) in soils interacts with polyvalent cations such as Ca2+ through hydroxyl (OH), carboxylic acid, ester, keto, aldehyde (summarized C=O), and carboxylate (COO?) functional groups. Such interactions affect the bonding strength of double bond between C O atom groups, which is assumed to shift wavenumber (WN) region O–H (hydroxyl), C=O, COO?, OMcat (i.e., C=O inte...
Clostridium cellulovorans uses not only cellulose but also xylan, mannan, pectin, and several other carbon sources for its growth and produces an extracellular multienzyme complex called the cellulosome, which is involved in plant cell wall degradation. Here we report a gene for a cellulosomal subunit, pectate lyase A (PelA), lying downstream of the engY gene, which codes for cellulosomal enzym...
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