Neuropeptide Y in the Adult and Fetal Human Pineal Gland
Figure 4
Photomicrographs of parts of human fetal pineal glands reacted immunohistochemically for neuropeptide Y. (a) Pineal gland from 6-month-old fetus. Arrows mark a long NPY-immunoreactive nerve fiber with large boutons en passage. (b) Pineal gland from 5-month-old fetus. Arrows mark an immunoreactive nerve fiber with large boutons en passage. Arrow heads point toward smaller immunoreactive boutons. Bar = 200 μm.
