It was found that 472 nucleotides from the 3' end and 731 nucleotides from the 5' end are sufficient for replication of a viral "minigenome", though not sufficient for infection.
Os 472 nucleótidos do extremo 3' e os 731 nucleótidos do extremo 5' son suficientes para a replicación do "minixenoma" viral, aínda que non son suficientes para a infección.