"Protein families" . "family of evolutionarily related proteins" . "protein domain families" . "classify proteins into evolutionary families" . . . "family of protein complexes" . "evolutionarily-related proteins" . . . . "protein families" . . "proteins" . "subfamily" . "Protein family" . "enzyme superfamilies" . . "multigene families" . . "subfamilies" . "family of evolutionarily related" . . . "evolutionarily related proteins" . . "superfamily" . "sub-family" . "protein-family" . "a family of proteins" . . . . "evolutionarily conserved of proteins" . . "superfamilies" . "family" . "structurally related proteins" . . "a family" . "Protein" . "families" . "Family" . . "groups" . "members" . "structural family" . . . . "Orthogroups" . "family of related proteins" . . . . . . "homologous protein-coding genes" . "enzyme families" . . . "family of proteins" . "Protein family" . "protein family" . "Families" . .