May affect the rate of fibrils formation. Binds to type I and type II collagen, fibronectin and TGF-beta. Forms a ternary complex with MFAP2 and ELN. Interacts with DPT. The attached glycosaminoglycan chain can be either chondroitin 4-sulfate, chondroitin 6-sulfate or dermatan sulfate, depending upon the tissue of origin. Belongs to the small leucine-rich proteoglycan (SLRP) family. SLRP class I subfamily.