represents the relative xylanase activity of the xylanase
produced by A. lentulus at different reaction temperatures ranging
from 50 to 90 C. The optimum temperature for xylanase activity
was found to be 60 C, with 94.1% activity obtained at 50 C and
86.4% at 70 C. The enzyme activity declined sharply with further
increase in temperature (19.4% activity at 90 C). Fig. 4b shows the
thermo-stability profile of crude xylanase from A. lentulus. For
thermo-stability studies, the diluted crude enzyme was incubated