Occasional positive cells in the lamina propria. It seems that cells of Meissners plexus are also positive.

Nerve positivity in tongue ( note the nerve fibres of the developing taste bud within the epithelium).

Myenteric plexus positivity in colon.

T/S through embryo showing CNS/PNS positivity.

Positive myenteric plexus.

Cerebellum

Positivity is seen within the developing Islets of Langerhans.