[Anti-actin and anti-tubulin antibodies in the serum of non-immunized animals].

The preparation and the purification of anti-action and anti-tubulin antibodies is reported. The occurrence of low amount of IgG anti-tubulin was also found in the sera of non-immunized animals from various species. The staining of the cellular network of microtubules as well as of tubulin paracrystals was observed with both induced and natural antibodies.