Developmental changes in components of chick brain microtubule-associated protein-1 (MAP-1) and tau proteins.

Microtubule proteins were purified from chick brains at various developmental stages from the 12-day embryo to adult. Three species of microtubule-associated protein-1 (MAP-1) and 5-7 molecular components of tau proteins were observed by SDS-polyacrylamide gel electrophoresis. The molecular compositions were observed to change during development of the chick brain.