HVEM-BTLA-Fc fusion protein design. (A) Schematic diagram of peptide elements in HVEM-BTLA-Fc fusion protein. (B) The amino acid sequence of HVEM-BTLA-Fc fusion protein. (C) The figure shows the solvent-accessible surface of the HVEM-BTLA-Fc dimer. Credit: The Journal of Immunology (2025). DOI: 10.1093/jimmun/vkae057