Figure 6From: CrfP, a fratricide protein, contributes to natural transformation in Streptococcus suisSpectrophotometric lysis assays of CrfP. The activity of CrfP was measured by determining the decrease in the OD600 within 1Â h. CrfP showed strong lytic activity against S. suis, including different serotypes but exhibited no lytic activity against E. coli or other Streptococcus species.Back to article page