[Virus-specific structures in Sendai virus infected Ehrlich ascitic carcinoma cells].

A virus-specific structure representing a ribonucleoprotein (RNP) associated with cell membranes was found in the cytoplasm of Sendai virus-infected cells of Ehrlich ascitic carcinoma. RNP could be separated from the membranes by recentrifugation of this structure in cesium chloride density gradient. In the liquid fraction, a structure with the same buoyant density possessing infectious activity was found. All structural polypeptides of virions with the exception of the membrane protein are found in the composition of the intracellular and extracellular structures.