Identification of the neuronal protein with antigenic properties of latrotoxin

: Monospecific antibodies against neurotoxin from the black widow spider venom (alpha-latrotoxin) have been used to identify a neuronal protein (s) with latrotoxin-like epitopes. As determined by ELISA, the protein is localized in cytoplasmic fraction of bovine brain. It was partially purified by anion-exchange chromatography and preparative SDS-electrophoresis. Immunoblotting data indicate that this neuronal acidic protein has molecular mass of ca. 100 kDa.