|  | Class b: All beta proteins [48724] (165 folds) | 
|  | Fold b.1: Immunoglobulin-like beta-sandwich [48725] (27 superfamilies) sandwich; 7 strands in 2 sheets; greek-key some members of the fold have additional strands | 
|  | Superfamily b.1.18: E set domains [81296] (20 families)  "Early" Ig-like fold families possibly related to the immunoglobulin and/or fibronectin type III superfamilies | 
|  | Family b.1.18.4: Class II viral fusion proteins C-terminal domain [81284] (2 proteins) | 
|  | Protein Fusion glycoprotein E1 [74840] (1 species) | 
|  | Semliki forest virus [TaxId:11033] [74841] (3 PDB entries) | 
|  | Domain d1i9wa1: 1i9w A:293-380 [71163] Other proteins in same PDB: d1i9wa2 | 
|  | Domain d1rera1: 1rer A:293-391 [97327] Other proteins in same PDB: d1rera2, d1rerb2, d1rerc2 | 
|  | Domain d1rerb1: 1rer B:293-391 [97329] Other proteins in same PDB: d1rera2, d1rerb2, d1rerc2 | 
|  | Domain d1rerc1: 1rer C:293-391 [97331] Other proteins in same PDB: d1rera2, d1rerb2, d1rerc2 complexed with br, fuc, ho, man, nag, po4 | 
|  | Domain d2alaa1: 2ala A:293-380 [126973] Other proteins in same PDB: d2alaa2 automatically matched to d1i9wa1 | 
Timeline for Protein Fusion glycoprotein E1 from b.1.18.4: Class II viral fusion proteins C-terminal domain: