Semi-quantitation of caveolin and CD36 with and without filipin treatment. Caveolin-enriched membrane protein fractions same as in Fig. 5 were analyzed with both anti-CD36 antibody (upper panel in A) and anti-caveolin antibody (lower panel in A) for the two protein presence. B. Quantitative comparison of caveolin and CD36 proteins in final caveolin-enriched membrane fraction from either filipin treated or untreated cells with dot blots. From left to right, 5, 10, 20 and 40 μg/dot of total proteins were loaded.