Fig. 5. Measurement of total GAG by HPLC on samples from proliferating or differentiating C2.7 cells. GAG extracts from proliferating and differentiating C2.7 cells were tagged with anthranilic acid and quantified by HPLC. Results were normalized to the amount of DNA in the samples. Data are expressed in arbitrary units of fluorescence (AUF)/µg DNA are the mean±s.d. of two independent experiments. **P<0.005; ***P<0.0005, when compared to AUF of the respective controls.