Pharmacokinetics studies of GST chimeric proteins. Mice intravenously inoculated with 1 nmol (about 50 ug) of the indicated protein were bled at the indicated days after injection and quantitated for remnant GST in blood using a GST capture assay. Sera from PBS-inoculated mice were used as negative controls. Values recorded 30 minutes after injection are indicated as day 0 values and were taken as 100% circulating GST. Data are expressed as the mean ± SD (n = 4 animals). One out of two experiments with similar results is shown. Asterisks (*) denote significant differences (P < .05) to GST-SAPA protein.