Predicted to enable several functions, including cholesterol binding activity; enzyme activator activity; and heparin binding activity. Involved in acylglycerol homeostasis. Acts upstream of or within triglyceride metabolic process and triglyceride-rich lipoprotein particle remodeling. Predicted to be located in extracellular space. Predicted to be part of chylomicron; high-density lipoprotein particle; and very-low-density lipoprotein particle. Is expressed in lung. Human ortholog(s) of this gene implicated in cerebral infarction; coronary artery disease; familial hyperlipidemia (multiple); and type 2 diabetes mellitus. Orthologous to human APOA5 (apolipoprotein A5). [provided by Alliance of Genome Resources, Apr 2022]