totivirus การใช้

• Based on sequence similarity of the RNA dependent RNA polymerase, the partitiviruses are probably derived from a totivirus ancestor.
• "Totivirus " have a genome of 4700 6700 nucleotides in length and only a single copy of the genome is present in the particle.
• The nucleic acid content of " Totivirus " is usually of one molecule but can also contain three or four segments of linear double stranded RNA . The genome contains two large overlapping open reading frames ( ORFs ).
• The 5'end of the positive strand of the dsRNA genome has no cap and is very structured . " Totivirus " contains a long 5'untranslated region ( 5'UTR ) which functions as an internal ribosome entry site ( IRES ) . " Totiviruses " can have satellite RNAs encoding a toxin.