The cDNA, for xylanase B from Penicillium purpurogenum was cloned and
sequenced. This DNA encodes a protein of 208 amino acids which is expe
cted to yield a protein of 183 residues upon processing of the N termi
nus. The sequence of the predicted protein is very similar to that of
40 other xylanase domains which belong to family G of cellulases/xylan
ases (73-21% identity).