Fig. 4. Thromboxane receptor-binding affinity in the presence of propofol (  black column ) or equivalent volume of Intralipos (  white column ). Zero control (  gradient-color column ) contained neither propofol nor Intralipos (n = 5 each). Data are expressed as count of ³H-S145 binding to platelets. ^a  P < 0.01 significantly different from that with zero control. There is no significant difference between the propofol and Intralipos groups.