May be involved in collagen fiber assembly. Homodimer. Forms a ternary complex with MFAP2 and ELN (By similarity). Found in several connective tissues, especially in articular cartilages. The two attached glycosaminoglycan chains can be either chondroitin sulfate or dermatan sulfate. The disease is caused by variants affecting the gene represented in this entry. The disease is caused by variants affecting the gene represented in this entry. Belongs to the small leucine-rich proteoglycan (SLRP) family. SLRP class I subfamily.