Fig. 4.
High magnification confocal images confirm the colocalization of CRY1 with the neuronal-activity marker c-Fos in large displaced ganglion cells in the garden warbler [during both night (shown) and day (data not shown)]. In contrast, the large displaced ganglion cells never express CRY1 in zebra finches, neither during the night nor during the day, when both active (c-Fos-positive, as shown) and inactive (c-Fos-negative) large displaced ganglion cells occur in zebra finches.
