Enables chondroitin sulfate proteoglycan binding activity. Acts upstream of or within neuron projection regeneration and regulation of axon regeneration. Located in neuron projection and neuronal cell body. Is expressed in several structures, including adrenal gland; alimentary system epithelium; central nervous system; genitourinary system; and nasal cavity epithelium. Human ortholog(s) of this gene implicated in hyperinsulinism. Orthologous to human PTPRF (protein tyrosine phosphatase receptor type F). [provided by Alliance of Genome Resources, Apr 2022]