This family consists of several borrelia hemolysin accessory proteins (BLYB). BLYB was thought to be an accessory protein, which was proposed to comprise a hemolysis system but it is now thought that BlyA and BlyB function instead as a prophage-encoded holin or holin-like system [1].

1: Characterization of Borrelia burgdorferi BlyA and BlyB proteins: a prophage-encoded holin-like system. Damman CJ, Eggers CH, Samuels DS, Oliver DB; J Bacteriol 2000;182:6791-6797. PMID:11073925

2: Borrelia burgdorferi supercoiled plasmids encode multicopy tandem open reading frames and a lipoprotein gene family. Porcella SF, Popova TG, Akins DR, Li M, Radolf JD, Norgard MV; J Bacteriol 1996;178:3293-3307. PMID:8655511