This protein is found in eukaryotes. Proteins in this family are typically between 254 to 536 amino acids in length. This family is the C terminal of a surface antigen of malarial Plasmodium species. It is currently being targeted for use as part of a subunit vaccine against Plasmodium falciparum, the main species involved in causing human malaria.

1: Characterisation of a tryptophan-rich Plasmodium falciparum antigen associated with merozoites. Ntumngia FB, Bouyou-Akotet MK, Uhlemann AC, Mordmuller B, Kremsner PG, Kun JF; Mol Biochem Parasitol. 2004;137:349-353. PMID:15383306