[Ultrastructural localization of Mg++- and Ca++-activated adenosine triphosphatase spinal ganglia of the sheep and goat].

Light and electron microscopic investigations on the Mg++- and Ca++-activated ATPase of sheep and goat dorsal root ganglion have been carried out. Reaction products occur in plasma membranes and interfaces between neurons and sheath cells, between adjacent sheath cells and on the surface of unmyelinated fibers. Cytoplasmic protrusions of ganglion cells and numerous surface increasing invaginations of sheath membranes form close connections between neurons and sheath cells.