tokens: Sequence analysis suggests that TtrA contains a molybdopterin guanine dinucleotide cofactor and a [ 4Fe-4S ] cluster , that TtrB binds four [ 4Fe-4S ] clusters , and that TtrC is an integral membrane protein containing a quinol oxidation site .
folded_tokens: sequence analysis suggest that ttra contain a molybdopterin guanine dinucleotide cofactor and a [ 4fe-4 ] cluster , that ttrb bind four [ 4fe-4 ] cluster , and that ttrc be a integral membrane protein contain a quinol oxidation site .