expression of plp and mbp genes progressed in the caudo-cranial direction in the brain as far as we examined it in the tissue sections up to the 30th postnatal day : mrnas of both genes were first detected in the pons and the medulla oblongata on the 3rd postnatal day and then in the cerebellum and the anterior part of the brain .
C0037303
cranial
C0006104
brain