This domain is found in Archaeoglobus fulgidus lipase (AFL). The domain consists of a layer of seven beta-sheet. When the domain is combined with the proximal domain, which is also a layer of seven beta-sheet, they form a beta sandwich. The combination of these two domains is known as the C-terminal domain. It is likely that the C-terminal domain plays an important role in substrate specificity, catalytic efficiency but also attributes partly to AFLs stability [1].

1: Structure of the alkalohyperthermophilic Archaeoglobus fulgidus lipase contains a unique C-terminal domain essential for long-chain substrate binding. Chen CK, Lee GC, Ko TP, Guo RT, Huang LM, Liu HJ, Ho YF, Shaw JF, Wang AH; J Mol Biol. 2009;390:672-685. PMID:19447113