The sample is dialyzed using cellulose acetate membrane at 4C overnight for the process to continue. The dialyzed sample of enzyme is allowed to flow through the prepared ion exchange column and left undisturbed for 10 minutes. After 10 minutes the extract is filtered down through the column. The gradient solution Tris NaCl (25:25) is allowed to flow through the column one after another and is left undisturbed for 2 to 3 minutes and the elute is collected followed by next elutant. Elutes are assayed for protein and Cellulase activity.