document: Dynamic light scattering characterization. The diameters of VLP-based samples in PBS buffer (pH = 7.4) were analysed by dynamic light scattering (DLS). Two hundred microlitres of VLP-based sample (Qβ VLPs and Qβ@b-3WJsiSCR MG) solution was added to a 3-open microvolume cuvette for diameter analysis.