Fig. 4From: Human bone morphogenetic protein-2 (hBMP-2) characterization by physical–chemical, immunological and biological assaysRP-HPLC quantitative and qualitative analysis of E. coli-derived hBMP-2: a hBMP-2-containing conditioned medium, 100 μL; b same conditioned medium to which a known amount (10 μg) of the GenScript reference preparation was added; c GenScript reference preparation (10 µg), used for quantitative determinationBack to article page