The structure of this protein revealed a bound fatty-acid molecule in a pocket between the two protein domains. The structure indicates that this family has the molecular function of fatty-acid binding and may play a role in the cellular functions of fatty acid transport or metabolism [1].

1: Crystal structure of a hypothetical protein, TM841 of Thermotoga maritima, reveals its function as a fatty acid-binding protein. Schulze-Gahmen U, Pelaschier J, Yokota H, Kim R, Kim SH; Proteins 2003;50:526-530. PMID:12577257