Enables heparan sulfate proteoglycan binding activity and heparin binding activity. Acts upstream of or within positive regulation of biomineralization. Located in extracellular matrix and extracellular space. Is expressed in several structures, including alimentary system; brain; reproductive system; respiratory system; and skeleton. Orthologous to human FBLN7 (fibulin 7). [provided by Alliance of Genome Resources, Apr 2022]