|  | Class a: All alpha proteins [46456] (144 folds) | 
|  | Fold a.89: Methyl-coenzyme M reductase alpha and beta chain C-terminal domain [48080] (1 superfamily) | 
|  | Superfamily a.89.1: Methyl-coenzyme M reductase alpha and beta chain C-terminal domain [48081] (1 family)  | 
|  | Family a.89.1.1: Methyl-coenzyme M reductase alpha and beta chain C-terminal domain [48082] (2 proteins) | 
|  | Protein Beta chain [48087] (3 species) | 
|  | Archaeon Methanobacterium thermoautotrophicum [TaxId:145262] [48088] (5 PDB entries) | 
|  | Archaeon Methanopyrus kandleri [TaxId:2320] [48089] (1 PDB entry) | 
|  | Archaeon Methanosarcina barkeri [TaxId:2208] [48090] (1 PDB entry) | 
Timeline for Protein Beta chain from a.89.1.1: Methyl-coenzyme M reductase alpha and beta chain C-terminal domain: