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Cumulative release of FITC-Dextran from PuraMatrix and oligomeric collagen matrices for 14 days (N = 5). FITC-dextran (Mw 20 000 and 40 000) served as model growth factors for (A) BMP2 and (B) VEGF, respectively. Fluorescence intensity was measured (Synergy HTX Microplate Reader, Biotek) using excitation and emission wavelengths of 485 and 520 nm, respectively.
