. . . . "Part of a common energy-coupling factor (ECF) ABC-transporter complex. Unlike classic ABC transporters this ECF transporter provides the energy necessary to transport a number of different substrates including 5-formyltetrahydrofolate and thiamine. Expression of the complex plus FolT or ThiT in Lactococcus lactis subsp. cremoris (strain NZ9000) allows 5-formyltetrahydrofolate or thiamine uptake respectively; 5-formyltetrahydrofolate or thiamine are not taken up in the absence of FolT/ThiT or the EcfA1A2T complex. Deenergized L.lactis subsp. cremoris (treated with 2-deoxyglucose) do not take up substrate." .