[Immunohistochemical study of protein S-100 in the neurons and glia of the grape snail (Helix pomatia)].

Indirect Coons' method was used to study the localization of the brain-specific S-100 protein in the neurons and the glia of Helix pomatia. This protein was demonstrated to be present in the cytoplasm of the nerve and glial cells, in the nuclei and the outer membrane of the neurons.