FIGURE 2.

Representative images of intracellular diffusion (A) and intercellular transfer (B) of Alexa488, viewed from the oocyte vegetal pole (Weber et al., 2004). Fluorescence intensity (indicating concentration) is encoded in terms of hue, increasing in the order of: black (zero) → violet → blue → green → yellow → red → white (highest). Specific times are as marked beside each snapshot. (A) Single-cell case. Dye diffuses from left to right (with lateral spreading) within one oocyte in the absence of junctional permeability. (B) Double-cell case. Dye diffuses from left to right within and between oocytes coupled by Cx32/Cx32 channels.