Paramyxoviridae

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Paramyxoviridae

(Science: virology) class V viruses of vertebrates. The genome consists of a single negative strand of rNA as one piece.

The helical nucleocapsid has a virus specific rNA polymerase (transcriptase) associated with it. They are enveloped viruses: main members are newcastle disease virus, measles virus and the parainfluenza viruses.