Developmental Changes in Components of Chick Brain Microtubule-Associated Protein-1 (MAP-1) and Tau Proteins1

Abstract
Microtubule proteins were purified from chick brains at various developmental stages from the 12-day embryo to adult. Three species of microtubule-associated protein-I (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.