This family consists of several insect apolipoprotein-III sequences. Exchangeable apolipoproteins constitute a functionally important family of proteins that play critical roles in lipid transport and lipoprotein metabolism. Apolipophorin III (apoLp-III) is a prototypical exchangeable apolipoprotein found in many insect species that functions in transport of diacylglycerol (DAG) from the fat body lipid storage depot to flight muscles in the adult life stage [1].

1: Structural basis for the conformational adaptability of apolipophorin III, a helix-bundle exchangeable apolipoprotein. Wang J, Sykes BD, Ryan RO; Proc Natl Acad Sci U S A 2002;99:1188-1193. PMID:11818551