Anti-FSTL1

This gene encodes a protein with similarity to follistatin, an activin-binding protein. It contains an FS module, a follistatin-like sequence containing 10 conserved cysteine residues. This gene product is thought to be an autoantigen associated with rheumatoid arthritis. Protein function: May modulate the action of some growth factors on cell proliferation and differentiation. Binds heparin. [The UniProt Consortium]