Figure 3.

Effect of heparin treatment on CPP-mediated delivery of the fluorescent fusion proteins to PC12 cells. Black bars: untreated cells incubated with 2.8 nmol of protein for 4 hours at 37°C; White bars: cells pre-treated with 100ug/mL of heparin before incubation with each protein. Each experiment was performed in triplicate (n=3) and error bars represent standard error. ‘*’ indicates the value is significantly different from the heparin treated cells.