SECTION 2 STOMACH SECTION 3 % OF TOTAL DOSE,!44ce Ww oO % OF TOTAL DOSE,'44¢e &—A\ NOT FED O--O FED BHRS AFTER O---O FEO 4HRS BEFORE 24 12 4 TIME (hours) tw, at SECTION 4 8 l2 16 Figure 2. Percent of total !*4ce activity (0.1 uCi) in the first four sections of the G.I. tract of mice on three fasting-feeding regimens as a function of time after oral dose administration. Vertical bars indicate associated standard errors. 640