This family consists of several Trypanosoma brucei putative variant specific antigen proteins of around 80 residues in length.

1: Selection for activation of a new variant surface glycoprotein gene expression site in Trypanosoma brucei can result in deletion of the old one. Rudenko G, Chaves I, Dirks-Mulder A, Borst P; Mol Biochem Parasitol 1998;95:97-109. PMID:9763292

2: The genes and transcripts of an antigen gene expression site from T. brucei. Pays E, Tebabi P, Pays A, Coquelet H, Revelard P, Salmon D, Steinert M; Cell 1989;57:835-845. PMID:2720787

3: Putative genes of a variant-specific antigen gene transcription unit in Trypanosoma brucei. Alexandre S, Guyaux M, Murphy NB, Coquelet H, Pays A, Steinert M, Pays E; Mol Cell Biol 1988;8:2367-2378. PMID:3405209