Figure 3From: Application of protein purification methods for the enrichment of a cytotoxin from Campylobacter jejuniStability of cytotoxic activity of pool B to trypsin digestion. Pool B (2 μg/ml) was treated with and without 125 μg/ml trypsin. The samples were then incubated with CHO cells overnight. Percent CHO cell death was determined using the MTT assay. Experiment was performed in triplicate, error bars represent standard error of mean (n = 3).Back to article page