This domain family is found in eukaryotes, and is approximately 60 amino acids in length. There are two conserved sequence motifs: QLS and LIDL. ApoB100 has an essential role in the assembly and secretion of triglyceride-rich lipoproteins and lipids transport.

1: Cloning and tissue expression characterization of the chicken APOB gene. Zhang S, Shi H, Li H; Anim Biotechnol. 2007;18:243-250. PMID:17934898