Figure 2
From: Onset of meiosis in the chicken embryo; evidence of a role for retinoic acid
Expression of Synatonemal Complex 3 protein (SCP3) in embryonic chicken gonads, assessed by immunofluorescence. Germ cells are recognised by their immunoreactivity to GCNA antibody (green). In the left female gonad, most germ cells are concentrated in the outer cortex (arrows), but some are present in the inner part of the medulla (arrowheads). Some SCP3 positive cells (red) are first detectable in the cortex of the left female gonad at day 15.5 (arrow), increasing in number up to day 17.5. No SCP3 positive cells are detectable in the left medulla, the right gonad, or in male gonads. In the right female gonad, GCNA staining (green; arrows) is gradually lost after day 14.5.