(Downloading may take up to 30 seconds.
If the slide opens in your browser, select File -> Save As to save it.)
Click on image to view larger version.

Fig. 1. Example fluorescence microscopy traces of fluorescein uptake in the
presence and absence of a representative OAT inhibitor, methotrexate. During
an uptake trial, the signal trace shows an initial rapid increase in
fluorescence due to the change-out of chamber with fluid containing FL (a),
followed by a slower increase representing accumulation in the tubule (b).