Q1. How can a virus containing an exoribonuclease mutate in the way you are saying? Coronaviruses possess an exoribonuclease within nonstructural protein 14 (nsp14-ExoN). This functions as a proofreader during viral transcription and encoding, ensuring high fidelity replication. This minimises the potential for mutation, as shown by the fact that sarbecovirus/lineage B betacoronaviruses with their […]
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