5JXS:
reference: Both Cis- and Trans- Activities of the Foot-and-Mouth Disease Virus 3D Polymerase are Essential for Viral RNA Replication., Herod MR, Ferrer-Orta C, Loundras EA, Ward JC, Verdaguer N, Rowlands DJ, Stonehouse NJ, J Virol. 2016 May 18. pii: JVI.00469-16. PMID: 27194768

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