[Study of the factor of ascites fluid of Erlich tumor].

The factor of nucleic nature was isolated by phenol method from acellular ascitic fluid of Ehrlich tumor. DNA was found to be the main component of the factor concerned as indicated by chemical analysis after its purification with preparative electrophoresis in 2.5% polyacrylamid gel or centrifugation in CsCl gradient. Moreover, the factor can be destroyed in incubation with DNA-s. It is not improbable that this factor consists also of small amounts of RNA.