May modulate neuronal adhesion and neurite growth during development by binding to neural cell adhesion molecules (NG-CAM and N-CAM). Chondroitin sulfate proteoglycan; binds to hyaluronic acid. Early postnatal and adult brain; not expressed in kidney, lung, liver and muscle. Contains mostly chondroitin sulfate, but also N-linked and O-linked oligosaccharides. Two isoforms were found that probably arise by proteolytic processing. The large isoform is predominant in early postnatal brain, the small isoform is found in adult brain. Belongs to the aggrecan/versican proteoglycan family.