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Plant cell wall (Primary plant cell wall (composed of: (CELLULOSE,…
Plant cell wall
Primary plant cell wall
90% polysaccharides
10% proteins
Plant during growth
composed of:
CELLULOSE
HEMICELLULOSE
PECTINS
PROTEINS
Secondary pllant cel wall
present when cell ends growth
composed of:
CELLULOSE
The major polysaccharides in plant cell walls. Cellulose consists of a glucopyranose monomers linked by Beta-1,4-glycosid bonds
CELLULASE
1,4 Beta-D-glucans or endoglucanases
Exoglucanases or cellobiohydrolases
Cellobiose or Beta-glucosidases:
HEMICELLULOSE
HEMICELLULASE
Xylanases
Beta-xylosidases: attack de Beta-1,4-linkages to liberate xylose from oligosaccharides
alfa-L-arabinofuranosidases: remove alfa-arabinofuranosidase side chains
Endo - 1,4- Beta- xylanases: cleave slong xylan backbone into short oligosaccharides
Acetyl xylan estarases: hydrolyze the acetate groups on xylan backcone
Ferulic acid estarases: hydrolyze the aromatic acids groups linked on arabinofuranoside residues
alfa-D-glucoronidases: hydrolyze the methyl glucoronate residues
LIGNIN