This family consists of several bacterial proteins of around 120 residues in length. Members of this family contain four highly conserved cysteine residues. Family members include lipoprotein LprI from Mycobacterium, which binds to and inhibits macrophage lysozyme, which may aid bacterial survival [1].

1: Lipoprotein LprI of Mycobacterium tuberculosis Acts as a Lysozyme Inhibitor. Sethi D, Mahajan S, Singh C, Lama A, Hade MD, Gupta P, Dikshit KL; J Biol Chem. 2016;291:2938-2953. PMID:26589796