Characterization of Virus-specific Messenger RNAs from Avian Fibroblasts Infected with Fowl Plague Virus

Abstract
In cell-free protein synthesizing systems from wheat embryos, mRNA extracted from chick embryo fibroblasts infected with fowl plague virus direct the synthesis of 9 virus-specific polypeptides, 2 of which may be related to the virus-specific glycopolypeptides. All of the mRNA are complementary in sequence to virion RNA, and RNA which do not contain poly A appear to be translated as efficiently as their polyadenylated counterparts. Under certain conditions of incubation, virion RNA also directs the synthesis of discrete polypeptides but these products are not detected in infected cells.