May anchor basement membranes to the underlying connective tissue. Binds the basement membrane heparan sulfate proteoglycan perlecan and triple helical collagens type I and type II. Connective tissue. The basic N-terminal Arg/Pro-rich region binds heparin and heparan sulfate. Binds collagens type I and type II through its leucine-rich repeat domain (By similarity). Belongs to the small leucine-rich proteoglycan (SLRP) family. SLRP class II subfamily.