Fig. 3. LDL endocytosis by CHO(iLR) cells is not significantly reduced by an equimolar concentration of RAP; however, endocytic uptake of HDLp is completely inhibited. CHO(iLR) cells were incubated for 30 minutes at 18°C with DiI-LDL (A) or OG-HDLp (B) in the presence of an equimolar concentration of unlabeled RAP. RAP is internalized by iLR-expressing CHO cells. CHO(iLR) (C) and wild-type CHO (D) cells were incubated with OG-RAP for 30 minutes at 18°C. Bar, 10 µm.