(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. 2. Fluorescence intensity (FI) ratios for cells versus bath
(circles) and lumen versus bath (triangles) as functions of the
concentration of Texas Red in the saline bathing isolated cricket Malpighian
tubules. An FI ratio for each site was calculated from the mean of
five FI measurements in the bathing saline, cells and lumen. Each
data point is the mean (± S.E.M.)
ratio for 56 widely separated regions in three tubules.