Monoegvirales

• includes measles, mumps, rabies, and E.bola
• has a helical nucleocapsid, -ssRNA monopartite and is enveloped
• it has a Start-stop-reset mechanism

  the RNA-dependent RNA polymerase will start transcription at the leader sequence and when it reaches the intergenic sequences it will repeatedly transcribe Us to create a poly-A tail. then the RDRP will either continue or will fall off and start again.
• Transcription attenuation is that more mRNA for 3' genes then there are for the 5' genes = density gradient
• RNA editing: extra nucleotides are insterted= frameshift mutation, allowing ,RNA or encode three proteins from a single gene