|  | Class b: All beta proteins [48724] (178 folds) | 
|  | Fold b.73: Head domain of nucleotide exchange factor GrpE [51063] (1 superfamily) small mixed beta-sheet, 4 "generalized" strands | 
|  | Superfamily b.73.1: Head domain of nucleotide exchange factor GrpE [51064] (1 family)  | 
|  | Family b.73.1.1: Head domain of nucleotide exchange factor GrpE [51065] (1 protein) | 
|  | Head domain of nucleotide exchange factor GrpE [51066] (1 species) | 
|  | Species Escherichia coli [TaxId:562] [51067] (1 PDB entry) | 
Timeline for Family b.73.1.1: Head domain of nucleotide exchange factor GrpE: