Figure 4From: Enhanced recovery of alkaline protease from fish viscera by phase partitioning and its application Influence of sodium citrate addition in the second ATPS on protease recovery (%), purification factor (PF), volume ratio (V R ) of alkaline protease partitioning in 15% PEG2000-15% sodium citrate containing 70% (w/w) crude enzyme extract, pH 8.5. Back to article page