Parvalbumin-immunoreactive material in the earthworm, Lumbricus terrestris

Parvalbumin-like material was localized using an immunoeytochcmieal method, in neurons of the central nervous system and in cells intermingled in the skin of the earthworm. Lumbricus terreslris L. Parvalbumin-immunoreactive material was found in the cytoplasm of perikarya and neutrites, not in the nucleoplasm. In contrast to vertebrates, Lumbricus musculature did not contain parvalbumin-immunoreactive material.