The non-structural protein exoribonuclease, for example, provides additional fidelity in replication by providing a proofreading function that RNA-dependent RNA polymerase lacks. One of the main functions of the complex is the replication of the viral genome.
Protini isiyokuwa na muundo ya exoribonclease, kwa mfano, hutoa uaminifu wa ziada wa urudufishaji kwa kutoa utendaji wa kupitia ambao polyemerase RNA inyotegemea RNA inakosa. Mojawapo ya kazi kuu za uchangamano huu ni kurudufu genomu ya virusi.