Issues

Cover picture: (Top) Confocal images of photoactivatable GFP equilibration within a Xenopus rod photoreceptor after multiphoton photoconversion in the inner segment. Movement into the outer segment occurs via the connecting cilium, which is ultrastructurally identical to primary cilia. (Bottom) Integrated fluorescence from the inner and outer segments as a function of time after photoconversion; dashed line is the predicted equilibrium level (see article by Calvert et al., 173–196; Alan S. Verkman acted as Guest Editor for this paper).