CTF1 and infection: At the same time, E-cad/CTF1, E-cad/CTF2 and E-cad/CTF3 were up-regulated by HpSS1 infection (Figure 5J), and Z-DEVD-FMK treatment reduced E-cad/CTF3 generation but showed no significant effects on the production of E-cad/CTF1 and E-cad/CTF2 (Figure 6J, 6K).