产品描述
活力：≥200 units/g solid
活力定义：One unit will liberate 1.0 mg of N-acetyl-D-glucosamine from chitin per hour at pH 6.0 at 25 °C in a 2 hour assay.
One new 1 hour unit = approx. 50 old 48 hour units.
储存条件：-20℃
外观：白色冻干粉
溶解性：H2O:soluble 0.9-1.1mg/ml
