Activity of CGTase
Enzyme assay was carried out according to the
method of Kaneko et al.12 After incubation for 24 hours,
the culture was centrifuged at 5000 rpm for 2 minutes.
0.5 ml of crude enzyme solution was added to 1.0 ml
of 0.04 g soluble starches in 1.0 ml of phosphate buffer,
pH 6.0. After incubation at 70°C for 10 minutes in
water bath, 0.03 M NaOH was immediately added to
the solution to stop the CGTase reaction. Then 0.5 ml
of 0.02% phenolphthalein in 0.005 M Na2
CO3
was