xylans การใช้

• The microbial degradation of cellulose and xylans requires several types of enzymes.
• Xylans are polysaccharides made from units of xylose ( a pentose sugar ).
• Arboreal carton nests of mangrove swamp-dwelling " Nasutitermes " are enriched in lignin and depleted in cellulose and xylans.
• Xylans are almost as ubiquitous as cellulose in plant cell walls and contain predominantly ?-D-xylose units linked as in cellulose.
• The enzyme hydrolyses 1, 4-beta-D-xylans, removing successive D-xylose residues from the non-reducing termini.
• Typically the content of xylans in hardwoods are 10-35 % of the hemicelluloses and in softwoods they are 10-15 % of the hemicelluloses.
• The microbial degradation of cellulose and xylans requires several types of enzymes such as endoglucanases ( ), cellobiohydrolases ( ) ( exoglucanases ), or xylanases ( ).
• In general softwood xylans differ from hardwood xylans by the lack of acetyl groups and the presence of arabinose units linked by ?-( 1, 3 )-glycosidic bonds to the xylan backbone.
• In general softwood xylans differ from hardwood xylans by the lack of acetyl groups and the presence of arabinose units linked by ?-( 1, 3 )-glycosidic bonds to the xylan backbone.
• Glycoside hydrolase family 67 includes alpha-glucuronidases, these are components of an ensemble of enzymes central to the recycling of photosynthetic biomass, remove the alpha-1, 2 linked 4-O-methyl glucuronic acid from xylans.