“…Top row: T = 1 capsids of bluetongue virus (BTV), orthoreovirus, rice dwarf virus (RDV), cytoplasmic polyhedrosis virus (CPV), rotavirus, grass carp reovirus (GCRV), picobirnavirus (PBV), ϕ6 phage and ϕ8 phage, L-A virus of Saccharomyces cerevisiae (ScV-L-A), Penicillium chrysogenum virus (PcV), Penicillium stoloniferum virus F (PsV-F), and Rosellinia necatrix quadrivirus 1 (RnQV1), viewed along a two-fold axis of icosahedral symmetry (center row). BTV VP3 [ 2 ] (PDB accession number 2btv; 901 residues), λ1 [ 41 ] (1ej6; 1275 residues), P3 [ 42 ] (1uf2; 1019 residues), VP1 [ 19 ] (3cnf; 1333 residues), VP2 [ 43 ] (3kz4; 880 residues), GCRV VP3 [ 22 ] (3k1q; 1027 residues), PBV CP [ 23 ] (2vf1; 590 residues), ϕ6 P1 [ 44 ] (4btq; 769 residues) and ϕ8 P1 [ 45 ] (4btp; 792 residues), Gag [ 26 ] (1m1c; 680 residues), PcV CP domain A [ 46 ] (3j3i; 498 residues; complete CP 982 residues), PsV-F CP [ 29 ] (3es5; 420 residues) and RnQV1-W1118 P2 and P4 [ 36 ] (5nd1; 972 and 1005 residues, respectively), shown from top view. Bottom row: side views of the same structures (T = 1 shell exterior at right).…”