Predicted to enable G protein-coupled receptor binding activity. Acts upstream of or within positive regulation of MAPK cascade; positive regulation of cell population proliferation; and regulation of angiogenesis. Located in extracellular region. Is expressed in embryo; liver; lung; metanephros; and testis. Orthologous to human PROK1 (prokineticin 1). [provided by Alliance of Genome Resources, Apr 2022]