Research Article

The Effect of Covalently Immobilized FGF-2 on Biphasic Calcium Phosphate Bone Substitute on Enhanced Biological Compatibility and Activity

Figure 4

XPS, C1s, and N1s spectra of (a) silanized BCP, (b) bifunctional cross-linked (maleimide) BCP, and (c) 100 ng FGF-2 coated BCP.