| Domain | Name | Category | Type | 
		| IPR000489 | Pterin-binding domain | Domain | Domain | 
		| IPR003726 | Homocysteine-binding domain | Domain | Domain | 
		| IPR003759 | Cobalamin (vitamin B12)-binding module, cap domain | Domain | Domain | 
		| IPR004223 | Vitamin B12-dependent methionine synthase, activation domain | Domain | Domain | 
		| IPR006158 | Cobalamin (vitamin B12)-binding domain | Domain | Domain | 
		| IPR011005 | Dihydropteroate synthase-like | Family | Homologous superfamily | 
		| IPR011822 | Cobalamin-dependent methionine synthase | Family | Family | 
		| IPR033706 | Methionine synthase, B12-binding domain | Domain | Domain | 
		| IPR036589 | Homocysteine-binding domain superfamily | Family | Homologous superfamily | 
		| IPR036594 | Methionine synthase domain | Family | Homologous superfamily | 
		| IPR036724 | Cobalamin-binding domain superfamily | Family | Homologous superfamily | 
		| IPR037010 | Vitamin B12-dependent methionine synthase, activation domain superfamily | Family | Homologous superfamily |