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Xylan 1,3-β-xylosidase (EC3.2.1.72, 1,3-β-D-xylosidase, exo-1,3-β-xylosidase, β-1,3′-xylanase, exo-β-1,3′-xylanase, 1,3-β-D-xylan xylohydrolase) is an enzyme with systematic name3-β-D-xylan xylohydrolase. It catalyses the hydrolysis of successive xylose residues from the non-reducing termini of (1→3)-β-D-xylans.