The Mlp (for Multicopy Lipoprotein) family of lipoproteins is found in Borrelia species [1]. This family were previously known as 2.9 lipoprotein genes [2]. These surface expressed genes may represent new candidate vaccinogens for Lyme disease [1]. Members of this family generally are downstream of four ORFs called A,B,C and D that are involved in hemolytic activity.

1: A monoclonal antibody generated by antigen inoculation via tick bite is reactive to the Borrelia burgdorferi Rev protein, a member of the 2.9 gene family locus. Gilmore RD Jr, Mbow ML; Infect Immun 1998;66:980-986. PMID:9488385

2: Identification, characterization, and expression of three new members of the Borrelia burgdorferi Mlp (2.9) lipoprotein gene family. Yang X, Popova TG, Hagman KE, Wikel SK, Schoeler GB, Caimano MJ, Radolf JD, Norgard MV; Infect Immun 1999;67:6008-6018. PMID:10531261