Clearance of A1-A1 from the mouse circulation. Serum concentration of fluorescently-labeled A1-A1 measured in BALB/c mice following (A) intraperitoneal administration with A1-A1 at a dose of 2 μg/g body weight and (B) intravenous injection with A1-A1 at a dose of 0.4 μg/g body weight. Each data point is the mean ± SD (n = 3).