Table 1.

Anionic polymers to enhance the activity of growth factors.

Anionic Polymer	Growth Factor	Reference
Heparin	BMP-2	[90,91]
Dextran sulfate	BMP-2	[90]
Dermatan sulfate	BMP-2	[102]
2-N,6-O-sulfated chitosan	BMP-2	[103]
Cellulose sulfate	BMP-2	[104]
Chitosan sulfate	BMP-2	[104]
Poly(vinyl sulfonate)	FGF-2	[105]
Poly(glutamic acid)	BMP-2	[106]