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Flaviviridae non-structural 3 protein (NS3) is a multifunctional enzyme, composed by a protease domain (NS3pro) and an RNA helicase domain (NS3hel). The activities present in NS3 have proved to be critical for viral replication. The replicative cycle of Flaviviridae requires coordinated regulation of all the activities present in the full-length NS3 protein, however, the exact nature of these interactions...