Abstract
Previously, we showed that 20-hydroxyecdysone induces selective phosphorylation of a fat body protein of Sarcophaga peregrina with a molecular mass of about 30,000 (30-kDa protein) (Itoh, K., Ueno, K., & Natori, S. (1985) Biochem. J . 227, 683–688). This paper describes the identification of this 30-kDa protein. From the electro-phoretic profile of 40S ribosomal proteins on two-dimensional polyacrylamide gel electrophoresis, the 30-kDa protein was identified as S6.