... andde-branched arabinans, and heteropolysaccharidessuch as arabinoxylans and arabinogalactans. Arabinanis composed of a- 1,5-linked l-arabinofuranosyl units,some of which are substituted with ... with a- 1,3- and a- 1,2-linked chains of l-arabinofuranosyl residues [4,5]. Twomajor enzymes hydrolyse arabinan: a- l-arabinofurano-sidases (AFNs; EC 3.2.1.55) and endo-1,5 -a- l-arab-inanases (ABNs; ... and arabinogalactan [6,7]. ABNs attack theglycosidic bonds of the a- 1,5-l-arabinan backbone,releasing a mixture of arabinooligosaccharides and l-arabinose [4]. These types of enzyme have attractedmuch...