13 108 MKKMPEKHDLLTAMMAAKEQGIGAILAFAMAYLRGRYNGGAFKKTLIDATMCAIIAWFIRDLLVFAGLSSNLAYIASVFIGYIGTDSIGSLIKRFAAKKAGVDDANQQ VLY1_BPP22 Holin Lysis protein 13 Essential for lysis of the bacterial cell wall by disrupting the cell membrane, thereby giving hydrolytic enzymes access to the cell wall.