Fig. 1. Examples of isolated trout intestinal cells in normal physiological saline
(no added Cuo) after 15 min (A) and 3 h (B), compared to cells
exposed to saline containing 800 µmol l1 Cuo
for 15 min (C) and 3 h (D). Cells were photographed in phase contrast (not
fixed or stained) using a Leica DMIRB microscope and a Nikon coolpix digital
camera. Scale bar, 2 µm.