| CPC A61K 39/21 (2013.01) [A61K 47/6425 (2017.08); A61K 47/6929 (2017.08); A61P 31/18 (2018.01); C12N 15/86 (2013.01); B82Y 5/00 (2013.01); B82Y 30/00 (2013.01); B82Y 40/00 (2013.01)] | 35 Claims |

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1. A polynucleotide, encoding a fusion protein comprising (a) an polypeptide immunogen, (b) a self-assembling nanoparticle subunit, and (c) a locking domain subunit that comprises the amino acid sequence set forth in SEQ ID NO:2, or a conservatively modified variant thereof.
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