Fig. 1From: A modular and self-adjuvanted multivalent vaccine platform based on porcine circovirus virus-like nanoparticles Schematic diagram of Cap-SC VLP based antigen display. AÂ vector constructs for expression of Cap-SC protein or ST-tagged GFP or E2. BÂ ST-tagged GFP or E2 was coupled and displayed onto Cap-SC VLPs to form Cap-GFP NPs or Cap-E2 NPs. CÂ Spontaneous isopeptide formation between the side chains of Asp in SpyTag and Lys in SpyCatcherBack to article page