Ty virus-like particles consist of a single protein species that can b
e produced in yeast. Recombinant Ty-VLPs carrying a string of up to 15
defined cytotoxic T lymphocyte (CTL) epitopes from Plasmodium species
prime protective CTL responses in mice following a single administrat
ion without adjuvant. Effective processing of epitopes from the string
was demonstrated in vitro and in vivo and was not affected by flankin
g sequences.