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Domains of 240 ?and 50 ? respectively (Figure 1A). In the field of antigenDomains of 240 ?and 50 ? respectively (Figure 1A). In the field of antigen display, the acetyltransferase core domain (CD) of the E2 protein is of great potential utility (E2DISP) (Figure 1B). Two engineered plasmids, pETHE2DISP and pET-E2DISP, allow to insert exogenous oligonucleotides coding for the antigen of intere