Figure 4. Albumin transport across the alveolar epithelium with inhibition of clathrin and transcytosis.

A and B, lungs were either aerosolized sham-treated (dark grey) or with chlorpromazine (black) or phenylarsine oxide (light grey). C and D, control lungs (dark grey) were sham-nebulized or treated with phalloidin oleate (PO, black) or monensin (light grey). Each data point represents the mean of six independent experiments (A and C). ¹²⁵I-albumin transport was set at 100% in control lungs and active transport of the tracer was expressed relative to this control value (B and D). Bars represent the mean ± SEM (n = 6 for all groups), **P < 0.01.