gpS protein Holin MKMPEKHDLLAAILAAKEQGIGAILAFAMAYLRGRYNGGAFTKTVIDATMCAIIAWFIRDLLDFAGLSSNLAYITSVFIGYIGTDSIGSLIKRFAAKKAGVEDGRNQ 107 VLYS_LAMBD Lysis protein S Lysis inhibitor S The 105 AA product induces host cell lysis by causing formation of pores in the inner membrane. The 107 AA protein counteracts the formation of such tunnels.