This can be
attributed to the fact that wheat bran had significantly lower
amount of lignin as compared to corncob and sugarcane bagasse
which could have hindered the exposure of cellulose towards
degradation (Perez et al., 2002). The obtained values of cellulase
activities are very low in proportion to the xylanase activities and
thus xylanase produced on these substrates utilizing yeast extract
as the nitrogen medium could be utilized for the applications
where cellulase-free xylanase is required such as for bleaching of
the pulp in paper industries. Fig. 2b shows the total protein and
specific xylanase activity obtained with each of the substrate.
Highest specific xylanase activitywas obtained with corn cob as the
substrate (4.9 U/mg).