ON THE MECHANISM OF THE TRANSPORT THROUGH GOLGI-APPARATUS

The application of an ultrastructural cytochemical method for K+-depen dent paranitrophenylphosphatase (Na+,K+-ATPase) has revealed patterns of plasticity of the Golgi apparatus of neurons in the cerebral cortex of 15-day-old rats. The peripheral part of the cis-most cisterna, bei ng usually reactive, deviates from its regular arrangement in the Golg i stack and contacts with adjacent profile of the granular endoplasmic reticulum or with the next cisterna. The findings prompt the hypothes is that active movements of the cis-cisternae may facilitate and accel erate the transport of nascent proteins to and through the Golgi appar atus. The question about the nature of the contacts between the pointe d membrane-bound compartments remains open.