Fig. 6From: Identification and immobilization of a novel cold-adapted esterase, and its potential for bioremediation of pyrethroid-contaminated vegetablesEffect of pH on the activity of soluble (filled square) and immobilized Est684 (open square). The optimum pH was measured using p-nitrophenyl acetate as a substrate at 18 °C. Data points are the average of triplicate measurements, and error bars represent the standard deviationBack to article page