2.6. Optimization of different carbon sources, nitrogen
sources and amino acids for amylase production
Different carbon and nitrogen sources (both at concentration
of 10 g/L) were used in minimal medium, pH 7 and incubated
at 32 C for 24 h. Similarly different amino acids like glycine,
alanine, aspartic acid and cysteine were used in the medium
for optimization.13 The culture filtrates were assayed for total
protein content and amylase activity.
2.7. Partial purification of amylase enzyme
The culture filtrate was precipitated using 80% w/v Ammonium
sulfate precipitation method.14 Then the precipitate was
separated by centrifugation at around 6700 g for 10 min. The
pretreatment of the dialysis membrane was done Ashwini
et al, 2011