Fig. 3.

Effect of NaCl concentration on the recovery of elastase and on purification factor (PF). Enzyme partitioning with respected to NaCl was implemented in systems containing 20% (w/w) PEG 2 000/13.2% (w/w) KH₂PO₄-K₂HPO₄ (pH 7.5). Three replicates were implemented to estimate experimental error with a, b, c, d, e above the columns standing for the significant difference (of recovery) revealed by Duncan’s multiple range test (P=0.05)