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Comparative Studies on LS Antigens Induced by Vaccinia and Cowpox Viruses

Department of Pathology Research Institute for Microbial Diseases Osaka University, Suita Osaka 565, Japan

The constituents of LS antigen from cells infected with vaccinia virus and with cowpox virus were compared by immunoprecipitation and SDS-polyacrylamide gel electrophoresis (SDS-PAGE). Antiserum to the LS antigen from cells infected with vaccinia virus reacted with at least five polypeptides in cells infected with either virus. Four of these polypeptides were similar sizes in cells infected with the two viruses. However, one major polypeptide with a mol. wt. of about 100000 (100 K) detected in cells infected with vaccinia virus was not found in cells infected with cowpox virus. Conversely, a polypeptide with a mol.wt. of about 60000 (60K) was detected only in cells infected with cowpox virus.

^* Present address: Department of Microbiology, Wakayama Medical College, Wakayama 640, Japan.

Received 10 April 1979; accepted 26 July 1979.