Enables triglyceride binding activity. Involved in cellular response to X-ray; negative regulation of apoptotic process; and positive regulation of lipid transport. Located in endoplasmic reticulum and extracellular region. Is expressed in several structures, including female reproductive system; intestine; and lower jaw. Orthologous to human PRAP1 (proline rich acidic protein 1). [provided by Alliance of Genome Resources, Apr 2022]