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Spring viremia of carp virus RNA and virion-associated transcriptase activity

An RNA-dependent RNA polymerase activity has been demonstrated for spring viremia of carp virus (SVCV). The optimal temperature for in vitro synthesis of RNA was 20 to 25 degrees C. The SVCV enzyme activity was stimulated when the methyl donor S-adenosyl-L-methionine was included in the reaction mixture. S-adenosyl-L-methionine was not particularly effective in stimulating the virion RNA polymerase activity of vesicular stomatitis virus or pike fry rhabdovirus. The 5' nucleotide of the SVCV viral RNA is pppAp.